diff --git a/examples/basics/src/main.rs b/examples/basics/src/main.rs
index 6c82f8769..7e1bc1c4f 100644
--- a/examples/basics/src/main.rs
+++ b/examples/basics/src/main.rs
@@ -51,7 +51,7 @@ fn index(mut req: HttpRequest) -> Result<HttpResponse> {
     // response
     Ok(HttpResponse::build(StatusCode::OK)
         .content_type("text/html; charset=utf-8")
-        .body(&html).unwrap())
+        .body(&html))
 
 }
 
@@ -69,7 +69,7 @@ fn p404(req: HttpRequest) -> Result<HttpResponse> {
     // response
     Ok(HttpResponse::build(StatusCode::NOT_FOUND)
         .content_type("text/html; charset=utf-8")
-        .body(html).unwrap())
+        .body(html))
 }
 
 
@@ -78,20 +78,19 @@ fn index_async(req: HttpRequest) -> FutureResult<HttpResponse, Error>
 {
     println!("{:?}", req);
 
-    result(HttpResponse::Ok()
-           .content_type("text/html")
-           .body(format!("Hello {}!", req.match_info().get("name").unwrap()))
-           .map_err(|e| e.into()))
+    result(Ok(HttpResponse::Ok()
+              .content_type("text/html")
+              .body(format!("Hello {}!", req.match_info().get("name").unwrap()))))
 }
 
 /// handler with path parameters like `/user/{name}/`
-fn with_param(req: HttpRequest) -> Result<HttpResponse>
+fn with_param(req: HttpRequest) -> HttpResponse
 {
     println!("{:?}", req);
 
-    Ok(HttpResponse::Ok()
-       .content_type("test/plain")
-       .body(format!("Hello {}!", req.match_info().get("name").unwrap()))?)
+    HttpResponse::Ok()
+        .content_type("test/plain")
+        .body(format!("Hello {}!", req.match_info().get("name").unwrap()))
 }
 
 fn main() {
diff --git a/examples/diesel/src/main.rs b/examples/diesel/src/main.rs
index 6a28107af..76ba2d39f 100644
--- a/examples/diesel/src/main.rs
+++ b/examples/diesel/src/main.rs
@@ -44,7 +44,7 @@ fn index(req: HttpRequest<State>) -> Box<Future<Item=HttpResponse, Error=Error>>
         .from_err()
         .and_then(|res| {
             match res {
-                Ok(user) => Ok(HttpResponse::Ok().json(user)?),
+                Ok(user) => Ok(HttpResponse::Ok().json(user)),
                 Err(_) => Ok(HttpResponse::InternalServerError().into())
             }
         })
diff --git a/examples/http-proxy/src/main.rs b/examples/http-proxy/src/main.rs
index 494351abb..73c91c0af 100644
--- a/examples/http-proxy/src/main.rs
+++ b/examples/http-proxy/src/main.rs
@@ -18,9 +18,7 @@ fn index(_req: HttpRequest) -> Box<Future<Item=HttpResponse, Error=Error>> {
             |resp| resp.body()         // <- this is MessageBody type, resolves to complete body
                 .from_err()            // <- convert PayloadError to a Error
                 .and_then(|body| {     // <- we got complete body, now send as server response
-                    HttpResponse::Ok()
-                        .body(body)
-                        .map_err(Error::from)
+                    Ok(HttpResponse::Ok().body(body))
                 }))
         .responder()
 }
@@ -33,11 +31,10 @@ fn streaming(_req: HttpRequest) -> Box<Future<Item=HttpResponse, Error=Error>> {
         .send()                         // <- connect to host and send request
         .map_err(Error::from)    // <- convert SendRequestError to an Error
         .and_then(|resp| {              // <- we received client response
-            HttpResponse::Ok()
-                // read one chunk from client response and send this chunk to a server response
-                // .from_err() converts PayloadError to a Error
-                .body(Body::Streaming(Box::new(resp.from_err())))
-                .map_err(|e| e.into()) // HttpOk::build() maybe return HttpError, we need to convert it to a Error
+            Ok(HttpResponse::Ok()
+               // read one chunk from client response and send this chunk to a server response
+               // .from_err() converts PayloadError to a Error
+               .body(Body::Streaming(Box::new(resp.from_err()))))
         })
         .responder()
 }
diff --git a/examples/json/src/main.rs b/examples/json/src/main.rs
index 40891d319..f92909fef 100644
--- a/examples/json/src/main.rs
+++ b/examples/json/src/main.rs
@@ -27,13 +27,13 @@ fn index(req: HttpRequest) -> Box<Future<Item=HttpResponse, Error=Error>> {
         .from_err()  // convert all errors into `Error`
         .and_then(|val: MyObj| {
             println!("model: {:?}", val);
-            Ok(HttpResponse::Ok().json(val)?)  // <- send response
+            Ok(HttpResponse::Ok().json(val))  // <- send response
         })
         .responder()
 }
 
 /// This handler uses `With` helper for loading serde json object.
-fn extract_item(item: Json<MyObj>) -> Result<HttpResponse, Error> {
+fn extract_item(item: Json<MyObj>) -> HttpResponse {
     println!("model: {:?}", &item);
     HttpResponse::Ok().json(item.0)  // <- send response
 }
@@ -64,7 +64,7 @@ fn index_manual(req: HttpRequest) -> Box<Future<Item=HttpResponse, Error=Error>>
         .and_then(|body| {
             // body is loaded, now we can deserialize serde-json
             let obj = serde_json::from_slice::<MyObj>(&body)?;
-            Ok(HttpResponse::Ok().json(obj)?) // <- send response
+            Ok(HttpResponse::Ok().json(obj)) // <- send response
         })
         .responder()
 }
@@ -79,7 +79,7 @@ fn index_mjsonrust(req: HttpRequest) -> Box<Future<Item=HttpResponse, Error=Erro
             let injson: JsonValue = match result { Ok(v) => v, Err(e) => object!{"err" => e.to_string() } };
             Ok(HttpResponse::Ok()
                 .content_type("application/json")
-                .body(injson.dump()).unwrap())
+                .body(injson.dump()))
         })
         .responder()
 }
diff --git a/examples/juniper/src/main.rs b/examples/juniper/src/main.rs
index a377b581e..a627425e1 100644
--- a/examples/juniper/src/main.rs
+++ b/examples/juniper/src/main.rs
@@ -67,7 +67,7 @@ fn graphiql(_req: HttpRequest<State>) -> Result<HttpResponse, Error>  {
     let html = graphiql_source("http://127.0.0.1:8080/graphql");
     Ok(HttpResponse::Ok()
         .content_type("text/html; charset=utf-8")
-        .body(html).unwrap())
+        .body(html))
 }
 
 fn graphql(req: HttpRequest<State>) -> Box<Future<Item=HttpResponse, Error=Error>> {
@@ -79,7 +79,7 @@ fn graphql(req: HttpRequest<State>) -> Box<Future<Item=HttpResponse, Error=Error
                 .from_err()
                 .and_then(|res| {
                     match res {
-                        Ok(user) => Ok(HttpResponse::Ok().body(user)?),
+                        Ok(user) => Ok(HttpResponse::Ok().body(user)),
                         Err(_) => Ok(HttpResponse::InternalServerError().into())
                     }
                 })
diff --git a/examples/protobuf/src/protobuf.rs b/examples/protobuf/src/protobuf.rs
index c06c191fd..2b117fe76 100644
--- a/examples/protobuf/src/protobuf.rs
+++ b/examples/protobuf/src/protobuf.rs
@@ -163,6 +163,6 @@ impl ProtoBufResponseBuilder for HttpResponseBuilder {
 
         let mut body = Vec::new();
         value.encode(&mut body).map_err(|e| ProtoBufPayloadError::Serialize(e))?;
-        Ok(self.body(body)?)
+        Ok(self.body(body))
     }
 }
diff --git a/examples/r2d2/src/main.rs b/examples/r2d2/src/main.rs
index 117675b89..528b4f200 100644
--- a/examples/r2d2/src/main.rs
+++ b/examples/r2d2/src/main.rs
@@ -34,7 +34,7 @@ fn index(req: HttpRequest<State>) -> Box<Future<Item=HttpResponse, Error=Error>>
         .from_err()
         .and_then(|res| {
             match res {
-                Ok(user) => Ok(HttpResponse::Ok().json(user)?),
+                Ok(user) => Ok(HttpResponse::Ok().json(user)),
                 Err(_) => Ok(HttpResponse::InternalServerError().into())
             }
         })
diff --git a/examples/state/src/main.rs b/examples/state/src/main.rs
index b9d1206da..7bd5f443a 100644
--- a/examples/state/src/main.rs
+++ b/examples/state/src/main.rs
@@ -11,8 +11,7 @@ use std::cell::Cell;
 
 use actix::prelude::*;
 use actix_web::{
-    http, server, ws, middleware,
-    Application, HttpRequest, HttpResponse, Error};
+    http, server, ws, middleware, Application, HttpRequest, HttpResponse};
 
 /// Application state
 struct AppState {
@@ -20,7 +19,7 @@ struct AppState {
 }
 
 /// simple handle
-fn index(req: HttpRequest<AppState>) -> Result<HttpResponse, Error> {
+fn index(req: HttpRequest<AppState>) -> HttpResponse {
     println!("{:?}", req);
     req.state().counter.set(req.state().counter.get() + 1);
 
diff --git a/examples/template_tera/src/main.rs b/examples/template_tera/src/main.rs
index 7876a9163..e10072553 100644
--- a/examples/template_tera/src/main.rs
+++ b/examples/template_tera/src/main.rs
@@ -27,7 +27,7 @@ fn index(req: HttpRequest<State>) -> Result<HttpResponse, Error> {
     };
     Ok(HttpResponse::Ok()
        .content_type("text/html")
-       .body(s)?)
+       .body(s))
 }
 
 fn main() {
diff --git a/examples/tls/src/main.rs b/examples/tls/src/main.rs
index 3f696f41c..8fa00abcc 100644
--- a/examples/tls/src/main.rs
+++ b/examples/tls/src/main.rs
@@ -15,7 +15,7 @@ fn index(req: HttpRequest) -> Result<HttpResponse, Error> {
     println!("{:?}", req);
     Ok(HttpResponse::Ok()
        .content_type("text/plain")
-       .body("Welcome!")?)
+       .body("Welcome!"))
 }
 
 fn main() {
diff --git a/examples/web-cors/backend/src/user.rs b/examples/web-cors/backend/src/user.rs
index 281c14453..364430fce 100644
--- a/examples/web-cors/backend/src/user.rs
+++ b/examples/web-cors/backend/src/user.rs
@@ -1,4 +1,4 @@
-use actix_web::{Error, HttpMessage, HttpResponse, HttpRequest};
+use actix_web::{AsyncResponder, Error, HttpMessage, HttpResponse, HttpRequest};
 use futures::Future;