diff --git a/build.rs b/build.rs
index 9dd324a..d84902b 100644
--- a/build.rs
+++ b/build.rs
@@ -1,5 +1,3 @@
-use r2r_common;
-use r2r_msg_gen;
 use std::env;
 use std::fs::File;
 use std::io::Write;
@@ -8,13 +6,13 @@ use std::path::{Path, PathBuf};
 fn main() {
     r2r_common::print_cargo_watches();
 
-    let msg_list = if let Some(cmake_includes) = env::var("CMAKE_INCLUDE_DIRS").ok() {
+    let msg_list = if let Ok(cmake_includes) = env::var("CMAKE_INCLUDE_DIRS") {
         let packages = cmake_includes
-            .split(":")
+            .split(':')
             .flat_map(|i| Path::new(i).parent())
             .collect::<Vec<_>>();
-        let deps = env::var("CMAKE_IDL_PACKAGES").unwrap_or(String::default());
-        let deps = deps.split(":").collect::<Vec<_>>();
+        let deps = env::var("CMAKE_IDL_PACKAGES").unwrap_or_default();
+        let deps = deps.split(':').collect::<Vec<_>>();
         let msgs = r2r_common::get_ros_msgs(&packages);
         r2r_common::parse_msgs(&msgs)
             .into_iter()
@@ -23,8 +21,8 @@ fn main() {
     } else {
         let ament_prefix_var = env::var("AMENT_PREFIX_PATH").expect("Source your ROS!");
         let paths = ament_prefix_var
-            .split(":")
-            .map(|i| Path::new(i))
+            .split(':')
+            .map(Path::new)
             .collect::<Vec<_>>();
         let msgs = r2r_common::get_ros_msgs(&paths);
         r2r_common::parse_msgs(&msgs)
@@ -65,11 +63,15 @@ fn main() {
                         codegen.push_str("    use super::super::super::super::*;\n");
 
                         let srvname = format!("{}_{}", msg, srv);
-                        codegen.push_str(&r2r_msg_gen::generate_rust_service(module, prefix, &srvname));
+                        codegen.push_str(&r2r_msg_gen::generate_rust_service(
+                            module, prefix, &srvname,
+                        ));
 
                         for s in &["Request", "Response"] {
                             let msgname = format!("{}_{}_{}", msg, srv, s);
-                            codegen.push_str(&r2r_msg_gen::generate_rust_msg(module, prefix, &msgname));
+                            codegen.push_str(&r2r_msg_gen::generate_rust_msg(
+                                module, prefix, &msgname,
+                            ));
                         }
                         codegen.push_str("    }\n");
                     }
diff --git a/examples/action_client.rs b/examples/action_client.rs
index c54e800..b9d06cc 100644
--- a/examples/action_client.rs
+++ b/examples/action_client.rs
@@ -2,7 +2,7 @@ use futures::executor::LocalPool;
 use futures::future::FutureExt;
 use futures::stream::StreamExt;
 use futures::task::LocalSpawnExt;
-use r2r;
+
 use r2r::example_interfaces::action::Fibonacci;
 use std::sync::{Arc, Mutex};
 
diff --git a/examples/action_client_untyped.rs b/examples/action_client_untyped.rs
index ccc5fe1..198a342 100644
--- a/examples/action_client_untyped.rs
+++ b/examples/action_client_untyped.rs
@@ -5,7 +5,7 @@ use futures::executor::LocalPool;
 use futures::future::FutureExt;
 use futures::stream::StreamExt;
 use futures::task::LocalSpawnExt;
-use r2r;
+
 use std::sync::{Arc, Mutex};
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
diff --git a/examples/action_server.rs b/examples/action_server.rs
index ea4ba4d..358dc56 100644
--- a/examples/action_server.rs
+++ b/examples/action_server.rs
@@ -2,7 +2,7 @@ use futures::executor::{LocalPool, LocalSpawner};
 use futures::future::{self, Either};
 use futures::stream::{Stream, StreamExt};
 use futures::task::LocalSpawnExt;
-use r2r;
+
 use r2r::example_interfaces::action::Fibonacci;
 use std::sync::{Arc, Mutex};
 
diff --git a/examples/client.rs b/examples/client.rs
index f4d9019..d3259d2 100644
--- a/examples/client.rs
+++ b/examples/client.rs
@@ -1,7 +1,7 @@
 use futures::executor::LocalPool;
 use futures::task::LocalSpawnExt;
 use futures::Future;
-use r2r;
+
 use std::io::Write;
 
 use r2r::example_interfaces::srv::AddTwoInts;
diff --git a/examples/clock.rs b/examples/clock.rs
index 3652132..a77435d 100644
--- a/examples/clock.rs
+++ b/examples/clock.rs
@@ -1,5 +1,3 @@
-use r2r;
-
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     {
         let mut clock = r2r::Clock::create(r2r::ClockType::RosTime)?;
diff --git a/examples/logging.rs b/examples/logging.rs
index 64f15fe..be73db1 100644
--- a/examples/logging.rs
+++ b/examples/logging.rs
@@ -1,5 +1,3 @@
-use r2r;
-
 /// try to run like this
 /// cargo run --example logging -- --ros-args --log-level DEBUG
 /// The logs produced with the node logger should show up in /rosout
diff --git a/examples/parameters.rs b/examples/parameters.rs
index f7bccbc..1fa5e20 100644
--- a/examples/parameters.rs
+++ b/examples/parameters.rs
@@ -1,7 +1,6 @@
 use futures::executor::LocalPool;
 use futures::prelude::*;
 use futures::task::LocalSpawnExt;
-use r2r;
 
 // try to run like this
 // cargo run --example parameters -- --ros-args -p key1:=[hello,world] -p key2:=5.5 -r __ns:=/demo -r __node:=my_node
diff --git a/examples/publishers.rs b/examples/publishers.rs
index 338600f..0803a47 100644
--- a/examples/publishers.rs
+++ b/examples/publishers.rs
@@ -1,4 +1,3 @@
-use r2r;
 use r2r::builtin_interfaces::msg::Duration;
 use r2r::std_msgs::msg::Int32;
 use r2r::trajectory_msgs::msg::*;
diff --git a/examples/rostopic_echo.rs b/examples/rostopic_echo.rs
index 199fa42..ae73d89 100644
--- a/examples/rostopic_echo.rs
+++ b/examples/rostopic_echo.rs
@@ -2,7 +2,7 @@ use futures::executor::LocalPool;
 use futures::future;
 use futures::stream::StreamExt;
 use futures::task::LocalSpawnExt;
-use r2r;
+
 use std::collections::HashMap;
 use std::env;
 use std::thread;
diff --git a/examples/rostopic_list.rs b/examples/rostopic_list.rs
index afa3e01..6b2940e 100644
--- a/examples/rostopic_list.rs
+++ b/examples/rostopic_list.rs
@@ -1,4 +1,3 @@
-use r2r;
 use std::thread;
 use std::time::Duration;
 
diff --git a/examples/service.rs b/examples/service.rs
index 444dce5..7f72ad7 100644
--- a/examples/service.rs
+++ b/examples/service.rs
@@ -4,7 +4,6 @@ use futures::stream::StreamExt;
 use futures::task::LocalSpawnExt;
 use futures::FutureExt;
 
-use r2r;
 use r2r::example_interfaces::srv::AddTwoInts;
 
 ///
diff --git a/examples/subscriber.rs b/examples/subscriber.rs
index fbd9a87..a186996 100644
--- a/examples/subscriber.rs
+++ b/examples/subscriber.rs
@@ -2,7 +2,6 @@ use futures::executor::LocalPool;
 use futures::future;
 use futures::stream::StreamExt;
 use futures::task::LocalSpawnExt;
-use r2r;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     let ctx = r2r::Context::create()?;
diff --git a/examples/tokio.rs b/examples/tokio.rs
index 4024fe8..b9cf5e7 100644
--- a/examples/tokio.rs
+++ b/examples/tokio.rs
@@ -1,6 +1,6 @@
 use futures::future;
 use futures::stream::StreamExt;
-use r2r;
+
 use std::sync::{Arc, Mutex};
 use tokio::task;
 
@@ -53,7 +53,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let mut timer = node
         .create_wall_timer(std::time::Duration::from_millis(2500))
         .unwrap();
-    let state_t2 = state.clone();
+    let state_t2 = state;
     task::spawn(async move {
         loop {
             let time_passed = timer.tick().await.unwrap();
diff --git a/examples/tokio_client.rs b/examples/tokio_client.rs
index 2174c02..f24c48f 100644
--- a/examples/tokio_client.rs
+++ b/examples/tokio_client.rs
@@ -1,7 +1,3 @@
-use r2r;
-
-
-
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let ctx = r2r::Context::create()?;
@@ -21,7 +17,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     waiting.await?;
     println!("service available.");
     for i in 1..10 {
-        let req = AddTwoInts::Request { a: i , b: 5 };
+        let req = AddTwoInts::Request { a: i, b: 5 };
         if let Ok(resp) = client.request(&req)?.await {
             println!("{}", resp.sum);
         }
diff --git a/examples/tokio_examples.rs b/examples/tokio_examples.rs
index 99cfba8..9b1b8a8 100644
--- a/examples/tokio_examples.rs
+++ b/examples/tokio_examples.rs
@@ -2,11 +2,9 @@ use std::sync::{Arc, Mutex};
 
 use futures::future;
 use futures::stream::StreamExt;
-use r2r;
+
 use tokio::task;
 
-
-
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let ctx = r2r::Context::create()?;
@@ -14,28 +12,23 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let arc_node = Arc::new(Mutex::new(node));
 
     let an = arc_node.clone();
-    task::spawn(async move {
-        subscriber(an).await.unwrap()
-    });
-    
-    let an = arc_node.clone();
-    task::spawn(async move {
-        publisher(an).await.unwrap()
-    });
+    task::spawn(async move { subscriber(an).await.unwrap() });
 
     let an = arc_node.clone();
-    task::spawn(async move {
-        client(an).await.unwrap()
-    });
+    task::spawn(async move { publisher(an).await.unwrap() });
 
     let an = arc_node.clone();
-    task::spawn(async move {
-        service(an).await.unwrap()
-    });
+    task::spawn(async move { client(an).await.unwrap() });
+
+    let an = arc_node.clone();
+    task::spawn(async move { service(an).await.unwrap() });
 
     let handle = tokio::task::spawn_blocking(move || loop {
         {
-            arc_node.lock().unwrap().spin_once(std::time::Duration::from_millis(10));
+            arc_node
+                .lock()
+                .unwrap()
+                .spin_once(std::time::Duration::from_millis(10));
         }
         std::thread::sleep(std::time::Duration::from_millis(100))
     });
@@ -45,13 +38,16 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     Ok(())
 }
 
-
 async fn subscriber(arc_node: Arc<Mutex<r2r::Node>>) -> Result<(), r2r::Error> {
-    let sub = arc_node.lock().unwrap().subscribe::<r2r::std_msgs::msg::String>("/topic")?;
+    let sub = arc_node
+        .lock()
+        .unwrap()
+        .subscribe::<r2r::std_msgs::msg::String>("/topic")?;
     sub.for_each(|msg| {
         println!("topic: new msg: {}", msg.data);
         future::ready(())
-    }).await;
+    })
+    .await;
     Ok(())
 }
 
@@ -65,9 +61,11 @@ async fn publisher(arc_node: Arc<Mutex<r2r::Node>>) -> Result<(), r2r::Error> {
     };
     for _ in 1..10 {
         timer.tick().await?;
-        let msg = r2r::std_msgs::msg::String{data: "hello from r2r".to_string() };
+        let msg = r2r::std_msgs::msg::String {
+            data: "hello from r2r".to_string(),
+        };
         publisher.publish(&msg)?;
-    };
+    }
     Ok(())
 }
 
@@ -85,12 +83,12 @@ async fn client(arc_node: Arc<Mutex<r2r::Node>>) -> Result<(), r2r::Error> {
     service_available.await?;
     println!("service available.");
     for i in 1..10 {
-        let req = AddTwoInts::Request { a: i , b: 5 };
+        let req = AddTwoInts::Request { a: i, b: 5 };
         if let Ok(resp) = client.request(&req).unwrap().await {
             println!("{}", resp.sum);
         }
         timer.tick().await?;
-    };
+    }
     Ok(())
 }
 
@@ -111,7 +109,6 @@ async fn service(arc_node: Arc<Mutex<r2r::Node>>) -> Result<(), r2r::Error> {
             }
             None => break,
         }
-    } 
+    }
     Ok(())
 }
-
diff --git a/examples/tokio_publisher.rs b/examples/tokio_publisher.rs
index d0fc94f..ea4171c 100644
--- a/examples/tokio_publisher.rs
+++ b/examples/tokio_publisher.rs
@@ -1,27 +1,24 @@
-use r2r;
-
-
-
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let ctx = r2r::Context::create()?;
     let mut node = r2r::Node::create(ctx, "testnode", "")?;
     let duration = std::time::Duration::from_millis(2500);
-    
+
     let mut timer = node.create_wall_timer(duration)?;
     let publisher = node.create_publisher::<r2r::std_msgs::msg::String>("/topic")?;
 
     let handle = tokio::task::spawn_blocking(move || loop {
         node.spin_once(std::time::Duration::from_millis(100));
     });
-    
+
     for _ in 1..10 {
         timer.tick().await?;
-        let msg = r2r::std_msgs::msg::String{data: "hello from r2r".to_string() };
+        let msg = r2r::std_msgs::msg::String {
+            data: "hello from r2r".to_string(),
+        };
         publisher.publish(&msg)?;
     }
 
-
     handle.await?;
     Ok(())
 }
diff --git a/examples/tokio_service.rs b/examples/tokio_service.rs
index a8b9163..6421170 100644
--- a/examples/tokio_service.rs
+++ b/examples/tokio_service.rs
@@ -1,8 +1,5 @@
-use r2r;
 use futures::stream::StreamExt;
 
-
-
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let ctx = r2r::Context::create()?;
@@ -26,7 +23,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
             None => break,
         }
     }
-    
+
     handle.await?;
 
     Ok(())
diff --git a/examples/tokio_subscriber.rs b/examples/tokio_subscriber.rs
index 3b25da0..6e30e81 100644
--- a/examples/tokio_subscriber.rs
+++ b/examples/tokio_subscriber.rs
@@ -1,15 +1,13 @@
 use futures::future;
 use futures::stream::StreamExt;
-use r2r;
-
-
+use r2r::QosProfile;
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let ctx = r2r::Context::create()?;
     let mut node = r2r::Node::create(ctx, "testnode", "")?;
-    
-    let sub = node.subscribe::<r2r::std_msgs::msg::String>("/topic")?;
+
+    let sub = node.subscribe::<r2r::std_msgs::msg::String>("/topic", QosProfile::default())?;
 
     let handle = tokio::task::spawn_blocking(move || loop {
         node.spin_once(std::time::Duration::from_millis(100));
@@ -18,9 +16,10 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     sub.for_each(|msg| {
         println!("topic: new msg: {}", msg.data);
         future::ready(())
-    }).await;
+    })
+    .await;
 
     handle.await?;
-   
+
     Ok(())
 }
diff --git a/examples/untyped_client.rs b/examples/untyped_client.rs
index 0c821ad..01ce621 100644
--- a/examples/untyped_client.rs
+++ b/examples/untyped_client.rs
@@ -1,7 +1,6 @@
 use futures::executor::LocalPool;
 use futures::task::LocalSpawnExt;
 use futures::Future;
-use r2r;
 
 async fn requester_task(
     node_available: impl Future<Output = r2r::Result<()>>,
diff --git a/examples/wall_timer.rs b/examples/wall_timer.rs
index b6a0023..1358f34 100644
--- a/examples/wall_timer.rs
+++ b/examples/wall_timer.rs
@@ -1,6 +1,6 @@
 use futures::executor::LocalPool;
 use futures::task::LocalSpawnExt;
-use r2r;
+
 use std::cell::RefCell;
 use std::rc::Rc;
 
diff --git a/r2r_rcl/build.rs b/r2r_rcl/build.rs
index db115e0..6b3bd88 100644
--- a/r2r_rcl/build.rs
+++ b/r2r_rcl/build.rs
@@ -1,7 +1,7 @@
 extern crate bindgen;
 
-use r2r_common;
 use itertools::Itertools;
+use r2r_common;
 use std::env;
 use std::path::{Path, PathBuf};
 
diff --git a/r2r_rcl/src/lib.rs b/r2r_rcl/src/lib.rs
index a653c84..72d9c9d 100644
--- a/r2r_rcl/src/lib.rs
+++ b/r2r_rcl/src/lib.rs
@@ -14,23 +14,6 @@ impl Default for rmw_message_info_t {
     }
 }
 
-impl Default for rmw_qos_profile_t {
-    fn default() -> Self {
-        let mut profile: rmw_qos_profile_t = unsafe { std::mem::zeroed() };
-        profile.history = rmw_qos_history_policy_t::RMW_QOS_POLICY_HISTORY_SYSTEM_DEFAULT;
-        profile.depth = 10;
-        profile.reliability =
-            rmw_qos_reliability_policy_t::RMW_QOS_POLICY_RELIABILITY_SYSTEM_DEFAULT;
-        profile.durability = rmw_qos_durability_policy_t::RMW_QOS_POLICY_DURABILITY_SYSTEM_DEFAULT;
-        profile.avoid_ros_namespace_conventions = false;
-        profile.deadline = rmw_time_t { sec: 0, nsec: 0 };
-        profile.lifespan = rmw_time_t { sec: 0, nsec: 0 };
-        profile.liveliness = rmw_qos_liveliness_policy_t::RMW_QOS_POLICY_LIVELINESS_SYSTEM_DEFAULT;
-        profile.liveliness_lease_duration = rmw_time_t { sec: 0, nsec: 0 };
-        profile
-    }
-}
-
 // special treatment to convert to/from rust strings.
 // ros strings are owned by ros, assignment is a copy
 impl rosidl_runtime_c__String {
diff --git a/src/action_clients.rs b/src/action_clients.rs
index 66c43dc..693f8c2 100644
--- a/src/action_clients.rs
+++ b/src/action_clients.rs
@@ -2,21 +2,17 @@ use futures::channel::{mpsc, oneshot};
 use futures::future::{FutureExt, TryFutureExt};
 use futures::stream::Stream;
 use std::collections::HashMap;
-use std::future::Future;
-use std::sync::{Mutex, Weak};
-use std::mem::MaybeUninit;
 use std::ffi::CString;
+use std::future::Future;
+use std::mem::MaybeUninit;
+use std::sync::{Mutex, Weak};
 
-use crate::error::*;
 use crate::action_common::*;
+use crate::error::*;
+use crate::msg_types::generated_msgs::{action_msgs, builtin_interfaces, unique_identifier_msgs};
 use crate::msg_types::*;
-use crate::msg_types::generated_msgs::{
-    unique_identifier_msgs,
-    action_msgs,
-    builtin_interfaces,
-};
-use r2r_rcl::*;
 use r2r_actions::*;
+use r2r_rcl::*;
 
 unsafe impl<T> Send for ActionClient<T> where T: WrappedActionTypeSupport {}
 
diff --git a/src/action_clients_untyped.rs b/src/action_clients_untyped.rs
index b455d08..9c7da32 100644
--- a/src/action_clients_untyped.rs
+++ b/src/action_clients_untyped.rs
@@ -3,20 +3,16 @@ use futures::future::{FutureExt, TryFutureExt};
 use futures::stream::Stream;
 use std::collections::HashMap;
 use std::future::Future;
-use std::sync::{Mutex, Weak};
 use std::mem::MaybeUninit;
+use std::sync::{Mutex, Weak};
 
-use crate::error::*;
-use crate::action_common::*;
-use crate::msg_types::*;
 use crate::action_clients::*;
-use crate::msg_types::generated_msgs::{
-    unique_identifier_msgs,
-    action_msgs,
-    builtin_interfaces,
-};
-use r2r_rcl::*;
+use crate::action_common::*;
+use crate::error::*;
+use crate::msg_types::generated_msgs::{action_msgs, builtin_interfaces, unique_identifier_msgs};
+use crate::msg_types::*;
 use r2r_actions::*;
+use r2r_rcl::*;
 //
 // TODO: refactor this to separate out shared code between typed action client and this.
 //
diff --git a/src/action_servers.rs b/src/action_servers.rs
index 154e330..935f4f6 100644
--- a/src/action_servers.rs
+++ b/src/action_servers.rs
@@ -8,16 +8,12 @@ use std::ffi::CString;
 use std::mem::MaybeUninit;
 use std::sync::{Arc, Mutex, Weak};
 
-use crate::error::*;
 use crate::action_common::*;
+use crate::error::*;
+use crate::msg_types::generated_msgs::{action_msgs, builtin_interfaces, unique_identifier_msgs};
 use crate::msg_types::*;
-use crate::msg_types::generated_msgs::{
-    unique_identifier_msgs,
-    action_msgs,
-    builtin_interfaces,
-};
-use r2r_rcl::*;
 use r2r_actions::*;
+use r2r_rcl::*;
 
 pub trait ActionServer_ {
     fn handle(&self) -> &rcl_action_server_t;
diff --git a/src/clients.rs b/src/clients.rs
index f2f27ef..106a315 100644
--- a/src/clients.rs
+++ b/src/clients.rs
@@ -1,12 +1,12 @@
 use futures::channel::oneshot;
 use futures::TryFutureExt;
-use std::future::Future;
 use std::ffi::CString;
+use std::future::Future;
 use std::mem::MaybeUninit;
 use std::sync::{Mutex, Weak};
 
-use crate::msg_types::*;
 use crate::error::*;
+use crate::msg_types::*;
 use r2r_rcl::*;
 
 /// ROS service client.
diff --git a/src/lib.rs b/src/lib.rs
index 8d5ec32..a567f2d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -28,13 +28,13 @@
 //!use futures::future;
 //!use futures::stream::StreamExt;
 //!use futures::task::LocalSpawnExt;
-//!use r2r;
+//!use r2r::QosProfile;
 //!
 //!fn main() -> Result<(), Box<dyn std::error::Error>> {
 //!    let ctx = r2r::Context::create()?;
 //!    let mut node = r2r::Node::create(ctx, "node", "namespace")?;
-//!    let subscriber = node.subscribe::<r2r::std_msgs::msg::String>("/topic")?;
-//!    let publisher = node.create_publisher::<r2r::std_msgs::msg::String>("/topic")?;
+//!    let subscriber = node.subscribe::<r2r::std_msgs::msg::String>("/topic", QosProfile::default())?;
+//!    let publisher = node.create_publisher::<r2r::std_msgs::msg::String>("/topic", QosProfile::default())?;
 //!    let mut timer = node.create_wall_timer(std::time::Duration::from_millis(1000))?;
 //!
 //!    // Set up a simple task executor.
@@ -68,7 +68,6 @@
 //!}
 //! ```
 
-
 // otherwise crates using r2r needs to specify the same version of uuid as
 // this crate depend on, which seem like bad user experience.
 pub extern crate uuid;
@@ -117,3 +116,6 @@ pub use clocks::{Clock, ClockType};
 
 mod nodes;
 pub use nodes::{Node, Timer};
+
+pub mod qos;
+pub use qos::QosProfile;
diff --git a/src/msg_types.rs b/src/msg_types.rs
index 01a1238..75de7d0 100644
--- a/src/msg_types.rs
+++ b/src/msg_types.rs
@@ -4,9 +4,9 @@ use r2r_rcl::{
     rosidl_action_type_support_t, rosidl_message_type_support_t, rosidl_service_type_support_t,
 };
 use serde::{Deserialize, Serialize};
+use std::convert::TryInto;
 use std::fmt::Debug;
 use std::ops::{Deref, DerefMut};
-use std::convert::TryInto;
 
 pub mod generated_msgs {
     use super::*;
diff --git a/src/nodes.rs b/src/nodes.rs
index a994974..cbd46a7 100644
--- a/src/nodes.rs
+++ b/src/nodes.rs
@@ -3,29 +3,30 @@ use futures::future::FutureExt;
 use futures::future::TryFutureExt;
 use futures::future::{self, join_all};
 use futures::stream::{Stream, StreamExt};
-use std::future::Future;
 use std::collections::HashMap;
 use std::ffi::{CStr, CString};
+use std::future::Future;
 use std::mem::MaybeUninit;
 use std::sync::{Arc, Mutex};
 use std::time::Duration;
 
-use r2r_rcl::*;
 use r2r_actions::*;
+use r2r_rcl::*;
 
-use crate::error::*;
-use crate::msg_types::*;
-use crate::msg_types::generated_msgs::rcl_interfaces;
-use crate::subscribers::*;
-use crate::publishers::*;
-use crate::services::*;
-use crate::clients::*;
 use crate::action_clients::*;
 use crate::action_clients_untyped::*;
 use crate::action_servers::*;
-use crate::context::*;
-use crate::parameters::*;
+use crate::clients::*;
 use crate::clocks::*;
+use crate::context::*;
+use crate::error::*;
+use crate::msg_types::generated_msgs::rcl_interfaces;
+use crate::msg_types::*;
+use crate::parameters::*;
+use crate::publishers::*;
+use crate::qos::QosProfile;
+use crate::services::*;
+use crate::subscribers::*;
 
 /// A ROS Node.
 ///
@@ -293,12 +294,16 @@ impl Node {
     /// Subscribe to a ROS topic.
     ///
     /// This function returns a `Stream` of ros messages.
-    pub fn subscribe<T: 'static>(&mut self, topic: &str) -> Result<impl Stream<Item = T> + Unpin>
+    pub fn subscribe<T: 'static>(
+        &mut self,
+        topic: &str,
+        qos_profile: QosProfile,
+    ) -> Result<impl Stream<Item = T> + Unpin>
     where
         T: WrappedTypesupport,
     {
         let subscription_handle =
-            create_subscription_helper(self.node_handle.as_mut(), topic, T::get_ts())?;
+            create_subscription_helper(self.node_handle.as_mut(), topic, T::get_ts(), qos_profile)?;
         let (sender, receiver) = mpsc::channel::<T>(10);
 
         let ws = TypedSubscriber {
@@ -315,12 +320,13 @@ impl Node {
     pub fn subscribe_native<T: 'static>(
         &mut self,
         topic: &str,
+        qos_profile: QosProfile,
     ) -> Result<impl Stream<Item = WrappedNativeMsg<T>> + Unpin>
     where
         T: WrappedTypesupport,
     {
         let subscription_handle =
-            create_subscription_helper(self.node_handle.as_mut(), topic, T::get_ts())?;
+            create_subscription_helper(self.node_handle.as_mut(), topic, T::get_ts(), qos_profile)?;
         let (sender, receiver) = mpsc::channel::<WrappedNativeMsg<T>>(10);
 
         let ws = NativeSubscriber {
@@ -339,10 +345,11 @@ impl Node {
         &mut self,
         topic: &str,
         topic_type: &str,
+        qos_profile: QosProfile,
     ) -> Result<impl Stream<Item = Result<serde_json::Value>> + Unpin> {
         let msg = WrappedNativeMsgUntyped::new_from(topic_type)?;
         let subscription_handle =
-            create_subscription_helper(self.node_handle.as_mut(), topic, msg.ts)?;
+            create_subscription_helper(self.node_handle.as_mut(), topic, msg.ts, qos_profile)?;
         let (sender, receiver) = mpsc::channel::<Result<serde_json::Value>>(10);
 
         let ws = UntypedSubscriber {
@@ -555,12 +562,16 @@ impl Node {
     }
 
     /// Create a ROS publisher.
-    pub fn create_publisher<T>(&mut self, topic: &str) -> Result<Publisher<T>>
+    pub fn create_publisher<T>(
+        &mut self,
+        topic: &str,
+        qos_profile: QosProfile,
+    ) -> Result<Publisher<T>>
     where
         T: WrappedTypesupport,
     {
         let publisher_handle =
-            create_publisher_helper(self.node_handle.as_mut(), topic, T::get_ts())?;
+            create_publisher_helper(self.node_handle.as_mut(), topic, T::get_ts(), qos_profile)?;
         let arc = Arc::new(publisher_handle);
         let p = make_publisher(Arc::downgrade(&arc));
         self.pubs.push(arc);
@@ -572,9 +583,11 @@ impl Node {
         &mut self,
         topic: &str,
         topic_type: &str,
+        qos_profile: QosProfile,
     ) -> Result<PublisherUntyped> {
         let dummy = WrappedNativeMsgUntyped::new_from(topic_type)?;
-        let publisher_handle = create_publisher_helper(self.node_handle.as_mut(), topic, dummy.ts)?;
+        let publisher_handle =
+            create_publisher_helper(self.node_handle.as_mut(), topic, dummy.ts, qos_profile)?;
         let arc = Arc::new(publisher_handle);
         let p = make_publisher_untyped(Arc::downgrade(&arc), topic_type.to_owned());
         self.pubs.push(arc);
diff --git a/src/publishers.rs b/src/publishers.rs
index 0dc3e4f..2012a16 100644
--- a/src/publishers.rs
+++ b/src/publishers.rs
@@ -1,10 +1,11 @@
 use std::ffi::CString;
 use std::fmt::Debug;
-use std::sync::Weak;
 use std::marker::PhantomData;
+use std::sync::Weak;
 
-use crate::msg_types::*;
 use crate::error::*;
+use crate::msg_types::*;
+use crate::qos::QosProfile;
 use r2r_rcl::*;
 
 // The publish function is thread safe. ROS2 docs state:
@@ -77,13 +78,14 @@ pub fn create_publisher_helper(
     node: &mut rcl_node_t,
     topic: &str,
     typesupport: *const rosidl_message_type_support_t,
+    qos_profile: QosProfile,
 ) -> Result<rcl_publisher_t> {
     let mut publisher_handle = unsafe { rcl_get_zero_initialized_publisher() };
     let topic_c_string = CString::new(topic).map_err(|_| Error::RCL_RET_INVALID_ARGUMENT)?;
 
     let result = unsafe {
         let mut publisher_options = rcl_publisher_get_default_options();
-        publisher_options.qos = rmw_qos_profile_t::default();
+        publisher_options.qos = qos_profile.into();
         rcl_publisher_init(
             &mut publisher_handle,
             node,
diff --git a/src/qos.rs b/src/qos.rs
new file mode 100644
index 0000000..f9ee69c
--- /dev/null
+++ b/src/qos.rs
@@ -0,0 +1,530 @@
+//! QoS (Quality of Service)
+//! full credit goes to https://github.com/rclrust/rclrust/blob/main/rclrust/src/qos.rs
+
+use std::time::Duration;
+
+use r2r_rcl::{
+    rmw_qos_durability_policy_t, rmw_qos_history_policy_t, rmw_qos_liveliness_policy_t,
+    rmw_qos_reliability_policy_t, rmw_time_t,
+};
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum HistoryPolicy {
+    KeepAll,
+    KeepLast,
+    SystemDefault,
+    Unknown,
+}
+
+impl From<HistoryPolicy> for rmw_qos_history_policy_t {
+    fn from(history_policy: HistoryPolicy) -> Self {
+        match history_policy {
+            HistoryPolicy::KeepAll => rmw_qos_history_policy_t::RMW_QOS_POLICY_HISTORY_KEEP_ALL,
+            HistoryPolicy::KeepLast => rmw_qos_history_policy_t::RMW_QOS_POLICY_HISTORY_KEEP_LAST,
+            HistoryPolicy::SystemDefault => {
+                rmw_qos_history_policy_t::RMW_QOS_POLICY_HISTORY_SYSTEM_DEFAULT
+            }
+            HistoryPolicy::Unknown => rmw_qos_history_policy_t::RMW_QOS_POLICY_HISTORY_UNKNOWN,
+        }
+    }
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum ReliabilityPolicy {
+    BestEffort,
+    Reliable,
+    SystemDefault,
+    Unknown,
+}
+impl From<ReliabilityPolicy> for rmw_qos_reliability_policy_t {
+    fn from(reliability_policy: ReliabilityPolicy) -> Self {
+        match reliability_policy {
+            ReliabilityPolicy::BestEffort => {
+                rmw_qos_reliability_policy_t::RMW_QOS_POLICY_RELIABILITY_BEST_EFFORT
+            }
+            ReliabilityPolicy::Reliable => {
+                rmw_qos_reliability_policy_t::RMW_QOS_POLICY_RELIABILITY_RELIABLE
+            }
+            ReliabilityPolicy::SystemDefault => {
+                rmw_qos_reliability_policy_t::RMW_QOS_POLICY_RELIABILITY_SYSTEM_DEFAULT
+            }
+            ReliabilityPolicy::Unknown => {
+                rmw_qos_reliability_policy_t::RMW_QOS_POLICY_RELIABILITY_UNKNOWN
+            }
+        }
+    }
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum DurabilityPolicy {
+    TransientLocal,
+    Volatile,
+    SystemDefault,
+    Unknown,
+}
+
+impl From<DurabilityPolicy> for rmw_qos_durability_policy_t {
+    fn from(durability_policy: DurabilityPolicy) -> Self {
+        match durability_policy {
+            DurabilityPolicy::TransientLocal => {
+                rmw_qos_durability_policy_t::RMW_QOS_POLICY_DURABILITY_TRANSIENT_LOCAL
+            }
+            DurabilityPolicy::Volatile => {
+                rmw_qos_durability_policy_t::RMW_QOS_POLICY_DURABILITY_VOLATILE
+            }
+            DurabilityPolicy::SystemDefault => {
+                rmw_qos_durability_policy_t::RMW_QOS_POLICY_DURABILITY_SYSTEM_DEFAULT
+            }
+            DurabilityPolicy::Unknown => {
+                rmw_qos_durability_policy_t::RMW_QOS_POLICY_DURABILITY_UNKNOWN
+            }
+        }
+    }
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum LivelinessPolicy {
+    Automatic,
+    ManualByNode,
+    ManualByTopic,
+    SystemDefault,
+    Unknown,
+}
+
+impl From<LivelinessPolicy> for rmw_qos_liveliness_policy_t {
+    fn from(liveliness_policy: LivelinessPolicy) -> Self {
+        match liveliness_policy {
+            LivelinessPolicy::Automatic => {
+                rmw_qos_liveliness_policy_t::RMW_QOS_POLICY_LIVELINESS_AUTOMATIC
+            }
+            LivelinessPolicy::ManualByNode => {
+                rmw_qos_liveliness_policy_t::RMW_QOS_POLICY_LIVELINESS_MANUAL_BY_NODE
+            }
+            LivelinessPolicy::ManualByTopic => {
+                rmw_qos_liveliness_policy_t::RMW_QOS_POLICY_LIVELINESS_MANUAL_BY_TOPIC
+            }
+            LivelinessPolicy::SystemDefault => {
+                rmw_qos_liveliness_policy_t::RMW_QOS_POLICY_LIVELINESS_SYSTEM_DEFAULT
+            }
+            LivelinessPolicy::Unknown => {
+                rmw_qos_liveliness_policy_t::RMW_QOS_POLICY_LIVELINESS_UNKNOWN
+            }
+        }
+    }
+}
+
+/// QoS profile
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct QosProfile {
+    /// History QoS policy setting.
+    pub history: HistoryPolicy,
+    /// Size of the message queue.
+    pub depth: usize,
+    /// Reliabiilty QoS policy setting.
+    pub reliability: ReliabilityPolicy,
+    /// Durability QoS policy setting.
+    pub durability: DurabilityPolicy,
+    /// The period at which messages are expected to be sent/received.
+    pub deadline: Duration,
+    /// The age at which messages are considered expired and no longer valid.
+    pub lifespan: Duration,
+    /// Liveliness QoS policy setting.
+    pub liveliness: LivelinessPolicy,
+    /// The time within which the RMW node or publisher must show that it is alive.
+    pub liveliness_lease_duration: Duration,
+    /// If true, any ROS specific namespacing conventions will be circumvented.
+    ///
+    /// In the case of DDS and topics, for example, this means the typical ROS specific prefix of rt
+    /// would not be applied as described here:
+    ///
+    /// <http://design.ros2.org/articles/topic_and_service_names.html#ros-specific-namespace-prefix>
+    ///
+    /// This might be useful when trying to directly connect a native DDS topic with a ROS 2 topic.
+    pub avoid_ros_namespace_conventions: bool,
+}
+
+impl QosProfile {
+    /// Sensor Data QoS class
+    ///    - History: Keep last,
+    ///    - Depth: 5,
+    ///    - Reliability: Best effort,
+    ///    - Durability: Volatile,
+    ///    - Deadline: Default,
+    ///    - Lifespan: Default,
+    ///    - Liveliness: System default,
+    ///    - Liveliness lease duration: Default,
+    ///    - avoid ros namespace conventions: false
+    pub const fn sensor_data() -> Self {
+        Self {
+            history: HistoryPolicy::KeepLast,
+            depth: 5,
+            reliability: ReliabilityPolicy::BestEffort,
+            durability: DurabilityPolicy::Volatile,
+            ..Self::common()
+        }
+    }
+
+    /// Parameters QoS class
+    ///    - History: Keep last,
+    ///    - Depth: 1000,
+    ///    - Reliability: Reliable,
+    ///    - Durability: Volatile,
+    ///    - Deadline: Default,
+    ///    - Lifespan: Default,
+    ///    - Liveliness: System default,
+    ///    - Liveliness lease duration: Default,
+    ///    - Avoid ros namespace conventions: false
+    pub const fn parameters() -> Self {
+        Self {
+            history: HistoryPolicy::KeepLast,
+            depth: 1000,
+            reliability: ReliabilityPolicy::Reliable,
+            durability: DurabilityPolicy::Volatile,
+            ..Self::common()
+        }
+    }
+
+    /// Default QoS class
+    ///    - History: Keep last,
+    ///    - Depth: 10,
+    ///    - Reliability: Reliable,
+    ///    - Durability: Volatile,
+    ///    - Deadline: Default,
+    ///    - Lifespan: Default,
+    ///    - Liveliness: System default,
+    ///    - Liveliness lease duration: Default,
+    ///    - Avoid ros namespace conventions: false
+    pub const fn default() -> Self {
+        Self {
+            history: HistoryPolicy::KeepLast,
+            depth: 10,
+            reliability: ReliabilityPolicy::Reliable,
+            durability: DurabilityPolicy::Volatile,
+            ..Self::common()
+        }
+    }
+
+    /// Services QoS class
+    ///    - History: Keep last,
+    ///    - Depth: 10,
+    ///    - Reliability: Reliable,
+    ///    - Durability: Volatile,
+    ///    - Deadline: Default,
+    ///    - Lifespan: Default,
+    ///    - Liveliness: System default,
+    ///    - Liveliness lease duration: Default,
+    ///    - Avoid ros namespace conventions: false
+    pub const fn services_default() -> Self {
+        Self {
+            history: HistoryPolicy::KeepLast,
+            depth: 10,
+            reliability: ReliabilityPolicy::Reliable,
+            durability: DurabilityPolicy::Volatile,
+            ..Self::common()
+        }
+    }
+
+    /// Parameter events QoS class
+    ///    - History: Keep last,
+    ///    - Depth: 1000,
+    ///    - Reliability: Reliable,
+    ///    - Durability: Volatile,
+    ///    - Deadline: Default,
+    ///    - Lifespan: Default,
+    ///    - Liveliness: System default,
+    ///    - Liveliness lease duration: Default,
+    ///    - Avoid ros namespace conventions: false
+    pub const fn parameter_events() -> Self {
+        Self {
+            history: HistoryPolicy::KeepLast,
+            depth: 1000,
+            reliability: ReliabilityPolicy::Reliable,
+            durability: DurabilityPolicy::Volatile,
+            ..Self::common()
+        }
+    }
+
+    /// System defaults QoS class
+    ///    - History: System default,
+    ///    - Depth: System default,
+    ///    - Reliability: System default,
+    ///    - Durability: System default,
+    ///    - Deadline: Default,
+    ///    - Lifespan: Default,
+    ///    - Liveliness: System default,
+    ///    - Liveliness lease duration: Default,
+    ///    - Avoid ros namespace conventions: false
+    pub const fn system_default() -> Self {
+        Self::common()
+    }
+
+    /// Unknow QoS class
+    ///    - History: Unknown,
+    ///    - Depth: System default,
+    ///    - Reliability: Unknown,
+    ///    - Durability: Unknown,
+    ///    - Deadline: Default,
+    ///    - Lifespan: Default,
+    ///    - Liveliness: Unknown,
+    ///    - Liveliness lease duration: Default,
+    ///    - Avoid ros namespace conventions: false
+    pub const fn unknown() -> Self {
+        Self {
+            history: HistoryPolicy::Unknown,
+            reliability: ReliabilityPolicy::Unknown,
+            durability: DurabilityPolicy::Unknown,
+            liveliness: LivelinessPolicy::Unknown,
+            ..Self::common()
+        }
+    }
+
+    const fn common() -> Self {
+        Self {
+            history: HistoryPolicy::SystemDefault,
+            depth: r2r_rcl::RMW_QOS_POLICY_DEPTH_SYSTEM_DEFAULT as usize,
+            reliability: ReliabilityPolicy::SystemDefault,
+            durability: DurabilityPolicy::SystemDefault,
+            deadline: Duration::ZERO,
+            lifespan: Duration::ZERO,
+            liveliness: LivelinessPolicy::SystemDefault,
+            liveliness_lease_duration: Duration::ZERO,
+            avoid_ros_namespace_conventions: false,
+        }
+    }
+
+    /// Set the history policy.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # use r2r::qos::{HistoryPolicy, QosProfile};
+    /// #
+    /// let qos = QosProfile::default().history(HistoryPolicy::KeepAll);
+    /// ```
+    pub const fn history(self, history: HistoryPolicy) -> Self {
+        Self { history, ..self }
+    }
+
+    /// Set the history to keep last.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # use r2r::qos::QosProfile;
+    /// #
+    /// let qos = QosProfile::default().keep_last(10);
+    /// ```
+    pub const fn keep_last(self, depth: usize) -> Self {
+        Self {
+            history: HistoryPolicy::KeepLast,
+            depth,
+            ..self
+        }
+    }
+
+    /// Set the history to keep all.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # use r2r::qos::QosProfile;
+    /// #
+    /// let qos = QosProfile::default().keep_all();
+    /// ```
+    pub const fn keep_all(self) -> Self {
+        Self {
+            history: HistoryPolicy::KeepAll,
+            depth: 0,
+            ..self
+        }
+    }
+
+    /// Set the reliability setting.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # use r2r::qos::{QosProfile, ReliabilityPolicy};
+    /// #
+    /// let qos = QosProfile::default().reliability(ReliabilityPolicy::Reliable);
+    /// ```
+    pub const fn reliability(self, reliability: ReliabilityPolicy) -> Self {
+        Self {
+            reliability,
+            ..self
+        }
+    }
+
+    /// Set the reliability setting to reliable.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # use r2r::qos::QosProfile;
+    /// #
+    /// let qos = QosProfile::default().reliable();
+    /// ```
+    pub const fn reliable(self) -> Self {
+        self.reliability(ReliabilityPolicy::Reliable)
+    }
+
+    /// Set the reliability setting to best effort.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # use r2r::qos::QosProfile;
+    /// #
+    /// let qos = QosProfile::default().best_effort();
+    /// ```
+    pub const fn best_effort(self) -> Self {
+        self.reliability(ReliabilityPolicy::BestEffort)
+    }
+
+    /// Set the durability setting.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # use r2r::qos::{DurabilityPolicy, QosProfile};
+    /// #
+    /// let qos = QosProfile::default().durability(DurabilityPolicy::Volatile);
+    /// ```
+    pub const fn durability(self, durability: DurabilityPolicy) -> Self {
+        Self { durability, ..self }
+    }
+
+    /// Set the durability setting to volatile.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # use r2r::qos::QosProfile;
+    /// #
+    /// let qos = QosProfile::default().volatile();
+    /// ```
+    pub const fn volatile(self) -> Self {
+        self.durability(DurabilityPolicy::Volatile)
+    }
+
+    /// Set the durability setting to transient local.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # use r2r::qos::QosProfile;
+    /// #
+    /// let qos = QosProfile::default().transient_local();
+    /// ```
+    pub const fn transient_local(self) -> Self {
+        self.durability(DurabilityPolicy::TransientLocal)
+    }
+
+    /// Set the deadline setting.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # use std::time::Duration;
+    /// #
+    /// # use r2r::qos::QosProfile;
+    /// #
+    /// let qos = QosProfile::default().deadline(Duration::from_secs(5));
+    /// ```
+    pub const fn deadline(self, deadline: Duration) -> Self {
+        Self { deadline, ..self }
+    }
+
+    /// Set the lifespan setting.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # use std::time::Duration;
+    /// #
+    /// # use r2r::qos::QosProfile;
+    /// #
+    /// let qos = QosProfile::default().lifespan(Duration::from_secs(5));
+    /// ```
+    pub const fn lifespan(self, lifespan: Duration) -> Self {
+        Self { lifespan, ..self }
+    }
+
+    /// Set the liveliness setting.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # use r2r::qos::{LivelinessPolicy, QosProfile};
+    /// #
+    /// let qos = QosProfile::default().liveliness(LivelinessPolicy::Automatic);
+    /// ```
+    pub const fn liveliness(self, liveliness: LivelinessPolicy) -> Self {
+        Self { liveliness, ..self }
+    }
+
+    /// Set the liveliness_lease_duration setting.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # use std::time::Duration;
+    /// #
+    /// # use r2r::qos::QosProfile;
+    /// #
+    /// let qos = QosProfile::default().liveliness_lease_duration(Duration::from_secs(5));
+    /// ```
+    pub const fn liveliness_lease_duration(self, liveliness_lease_duration: Duration) -> Self {
+        Self {
+            liveliness_lease_duration,
+            ..self
+        }
+    }
+
+    /// Set the avoid_ros_namespace_conventions setting.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # use r2r::qos::QosProfile;
+    /// #
+    /// let qos = QosProfile::default().avoid_ros_namespace_conventions(true);
+    /// ```
+    pub const fn avoid_ros_namespace_conventions(
+        self,
+        avoid_ros_namespace_conventions: bool,
+    ) -> Self {
+        Self {
+            avoid_ros_namespace_conventions,
+            ..self
+        }
+    }
+}
+
+impl From<QosProfile> for r2r_rcl::rmw_qos_profile_t {
+    fn from(qos: QosProfile) -> Self {
+        Self {
+            history: qos.history.into(),
+            depth: qos.depth,
+            reliability: qos.reliability.into(),
+            durability: qos.durability.into(),
+            deadline: qos.deadline.to_rmw_time_t(),
+            lifespan: qos.lifespan.to_rmw_time_t(),
+            liveliness: qos.liveliness.into(),
+            liveliness_lease_duration: qos.liveliness_lease_duration.to_rmw_time_t(),
+            avoid_ros_namespace_conventions: qos.avoid_ros_namespace_conventions,
+        }
+    }
+}
+pub(crate) trait RclDurationT {
+    fn to_rmw_time_t(&self) -> rmw_time_t;
+}
+
+impl RclDurationT for Duration {
+    fn to_rmw_time_t(&self) -> rmw_time_t {
+        rmw_time_t {
+            sec: self.as_secs(),
+            nsec: self.subsec_nanos().into(),
+        }
+    }
+}
diff --git a/src/services.rs b/src/services.rs
index f232d6d..fcbe75b 100644
--- a/src/services.rs
+++ b/src/services.rs
@@ -1,10 +1,10 @@
 use futures::channel::{mpsc, oneshot};
 use std::ffi::CString;
-use std::sync::{Arc, Mutex, Weak};
 use std::mem::MaybeUninit;
+use std::sync::{Arc, Mutex, Weak};
 
-use crate::msg_types::*;
 use crate::error::*;
+use crate::msg_types::*;
 use r2r_rcl::*;
 
 /// Encapsulates a service request.
diff --git a/src/subscribers.rs b/src/subscribers.rs
index 0da8d6a..c9e16fd 100644
--- a/src/subscribers.rs
+++ b/src/subscribers.rs
@@ -1,8 +1,9 @@
 use futures::channel::mpsc;
 use std::ffi::CString;
 
-use crate::msg_types::*;
 use crate::error::*;
+use crate::msg_types::*;
+use crate::qos::QosProfile;
 use r2r_rcl::*;
 
 pub trait Subscriber_ {
@@ -161,13 +162,14 @@ pub fn create_subscription_helper(
     node: &mut rcl_node_t,
     topic: &str,
     ts: *const rosidl_message_type_support_t,
+    qos_profile: QosProfile,
 ) -> Result<rcl_subscription_t> {
     let mut subscription_handle = unsafe { rcl_get_zero_initialized_subscription() };
     let topic_c_string = CString::new(topic).map_err(|_| Error::RCL_RET_INVALID_ARGUMENT)?;
 
     let result = unsafe {
         let mut subscription_options = rcl_subscription_get_default_options();
-        subscription_options.qos = rmw_qos_profile_t::default();
+        subscription_options.qos = qos_profile.into();
         rcl_subscription_init(
             &mut subscription_handle,
             node,
diff --git a/tests/threads.rs b/tests/threads.rs
index ad47e6b..0bf21fa 100644
--- a/tests/threads.rs
+++ b/tests/threads.rs
@@ -1,8 +1,6 @@
 use std::thread;
 use std::time::Duration;
 
-use r2r;
-
 #[test]
 // Let's create and drop a lot of node and publishers for a while to see that we can cope.
 fn doesnt_crash() -> Result<(), Box<dyn std::error::Error>> {
diff --git a/tests/tokio_testing.rs b/tests/tokio_testing.rs
index 0678181..66d349d 100644
--- a/tests/tokio_testing.rs
+++ b/tests/tokio_testing.rs
@@ -1,5 +1,5 @@
 use futures::stream::StreamExt;
-use r2r;
+
 use std::sync::{Arc, Mutex};
 use tokio::task;
 
@@ -60,7 +60,7 @@ async fn tokio_testing() -> Result<(), Box<dyn std::error::Error>> {
             }
         }
 
-        state.lock().unwrap().clone()
+        *state.lock().unwrap()
     });
     let x = handle.join().unwrap();
     assert_eq!(x, 19);