diff --git a/app/src/main/java/com/livinglifetechway/k4kotlinsample/ApiInterface.kt b/app/src/main/java/com/livinglifetechway/k4kotlinsample/ApiInterface.kt
new file mode 100644
index 0000000..10732e1
--- /dev/null
+++ b/app/src/main/java/com/livinglifetechway/k4kotlinsample/ApiInterface.kt
@@ -0,0 +1,41 @@
+package com.livinglifetechway.k4kotlinsample.RetrofitApi
+
+import retrofit2.Call
+import retrofit2.http.GET
+
+/**
+ */
+interface ApiInterface {
+    @GET("posts/1")
+    fun getPost(): Call<Post>
+
+    @GET("users")
+    fun getUserDetails(): Call<UserResp>
+
+    @GET("aaaa/bbbb")
+    fun getUserDetailsError(): Call<UserResp>
+
+}
+
+
+data class Post(
+        val userId: Int, //1
+        val id: Int, //1
+        val title: String, //sunt aut facere repellat provident occaecati excepturi optio reprehenderit
+        val body: String //quia et suscipit suscipit recusandae consequuntur expedita et cum reprehenderit molestiae ut ut quas totam nostrum rerum est autem sunt rem eveniet architecto
+)
+
+data class UserResp(
+        val page: Int, //2
+        val per_page: Int, //3
+        val total: Int, //12
+        val total_pages: Int, //4
+        val data: List<Data>
+)
+
+data class Data(
+        val id: Int, //4
+        val first_name: String, //Eve
+        val last_name: String, //Holt
+        val avatar: String //https://s3.amazonaws.com/uifaces/faces/twitter/marcoramires/128.jpg
+)
\ No newline at end of file
diff --git a/app/src/main/java/com/livinglifetechway/k4kotlinsample/RetrofitActivity.kt b/app/src/main/java/com/livinglifetechway/k4kotlinsample/RetrofitActivity.kt
index 431b0e7..23ffdbb 100644
--- a/app/src/main/java/com/livinglifetechway/k4kotlinsample/RetrofitActivity.kt
+++ b/app/src/main/java/com/livinglifetechway/k4kotlinsample/RetrofitActivity.kt
@@ -10,8 +10,6 @@ import com.livinglifetechway.k4kotlinsample.RetrofitApi.ApiClient
 import com.livinglifetechway.k4kotlinsample.databinding.ActivityRetrofitBinding
 import kotlinx.coroutines.experimental.android.UI
 import kotlinx.coroutines.experimental.async
-import kotlinx.coroutines.experimental.launch
-import kotlinx.coroutines.experimental.runBlocking
 
 class RetrofitActivity : AppCompatActivity() {
 
@@ -20,21 +18,7 @@ class RetrofitActivity : AppCompatActivity() {
         super.onCreate(savedInstanceState)
         mBinding = setBindingView(R.layout.activity_retrofit)
 
-//        runBlocking {
-//            val job = launch(UI) {
-//                val enqueueAwait = ApiClient.service.getUserDetails().enqueueAwait(this@RetrofitActivity, RetrofitCallback {
-//                    progressView = mBinding.progressBar
-//
-//                    on200Ok { call, response ->
-//                        get original response object
-//                    }
-//                })
-//                mBinding.tvResponse.text = enqueueAwait.toString()
-//            }
-//        }
-//        mBinding.tvInfo.text = "This is runblocking"
-
-
+        // simple enqueue with lifecycle owner
         mBinding.btnEnqueue.setOnClickListener {
             mBinding.tvResponse.text = ""
             mBinding.tvInfo.text = ""
@@ -45,6 +29,9 @@ class RetrofitActivity : AppCompatActivity() {
                     mBinding.tvInfo.append("Response Received \n")
                     mBinding.tvResponse.text = response?.body()?.toString()
                 }
+                onFailureNotCancelled { call, throwable ->
+                    mBinding.tvInfo.append("Error: ${throwable?.message}\n")
+                }
             })
             mBinding.tvInfo.append("API call enqueued \n")
         }
@@ -99,30 +86,6 @@ class RetrofitActivity : AppCompatActivity() {
             }
         }
 
-
-
-        mBinding.btnEnqueueAwaitRunblocking.setOnClickListener {
-            mBinding.progressBar.show()
-            mBinding.tvResponse.text = ""
-            mBinding.tvInfo.text = ""
-
-            runBlocking {
-                launch(UI) {
-                    mBinding.tvInfo.append("Starting API call \n")
-                    val enqueueAwait = ApiClient.service.getUserDetails().enqueueAwait(this@RetrofitActivity, RetrofitCallback {
-                        progressView = mBinding.progressBar
-
-                        on200Ok { call, response ->
-                            mBinding.tvInfo.append("Response received \n")
-                        }
-                    })
-                    mBinding.tvInfo.append("Await call completed \n")
-                    mBinding.tvResponse.text = enqueueAwait.toString()
-                }
-            }
-            mBinding.tvInfo.append("Run Blocking completed \n")
-        }
-//
         // deferred response body
         mBinding.btnEnqueueDeferred.setOnClickListener {
             mBinding.progressBar.show()
diff --git a/app/src/main/res/layout/activity_retrofit.xml b/app/src/main/res/layout/activity_retrofit.xml
index 5ec4bb8..06abfae 100644
--- a/app/src/main/res/layout/activity_retrofit.xml
+++ b/app/src/main/res/layout/activity_retrofit.xml
@@ -60,12 +60,6 @@
                 android:layout_height="wrap_content"
                 android:text="Enqueue Await With Error" />
 
-            <Button
-                android:id="@+id/btn_enqueue_await_runblocking"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="Enqueue Await in Runblocking" />
-
             <Button
                 android:id="@+id/btn_enqueue_deferred"
                 android:layout_width="wrap_content"
diff --git a/k4kotlin-retrofit/src/main/java/com/livinglifetechway/k4kotlin_retrofit/Retrofit.kt b/k4kotlin-retrofit/src/main/java/com/livinglifetechway/k4kotlin_retrofit/Retrofit.kt
index 031d8f6..a5889bc 100644
--- a/k4kotlin-retrofit/src/main/java/com/livinglifetechway/k4kotlin_retrofit/Retrofit.kt
+++ b/k4kotlin-retrofit/src/main/java/com/livinglifetechway/k4kotlin_retrofit/Retrofit.kt
@@ -35,6 +35,8 @@ fun <T> Call<T>.enqueue(lifecycleOwner: LifecycleOwner, callback: Callback<T>) {
  * You can optionally pass the lifecycleOwner (activity/fragment) to scope the call.
  * Also you can optionally pass the callback function as well,
  * it will be called before returning results.
+ *
+ * NOTE: This is an experimental API. Please report bugs if you find any.
  */
 suspend fun <T> Call<T>.enqueueAwait(lifeCycleOwner: LifecycleOwner? = null, callback: Callback<T>? = null): T {
 
@@ -82,6 +84,8 @@ suspend fun <T> Call<T>.enqueueAwait(lifeCycleOwner: LifecycleOwner? = null, cal
  * You can optionally pass the lifecycleOwner (activity/fragment) to scope the call.
  * Also you can optionally pass the callback function as well,
  * it will be called when results are available.
+ *
+ * NOTE: This is an experimental API. Please report bugs if you find any.
  */
 fun <T> Call<T>.enqueueDeferred(lifeCycleOwner: LifecycleOwner? = null, callback: Callback<T>? = null): CompletableDeferred<T> {
 
@@ -125,6 +129,8 @@ fun <T> Call<T>.enqueueDeferred(lifeCycleOwner: LifecycleOwner? = null, callback
  * You can optionally pass the lifecycleOwner (activity/fragment) to scope the call.
  * Also you can optionally pass the callback function as well,
  * it will be called when results are available.
+ *
+ * NOTE: This is an experimental API. Please report bugs if you find any.
  */
 fun <T> Call<T>.enqueueDeferredResponse(lifeCycleOwner: LifecycleOwner? = null, callback: Callback<T>? = null): CompletableDeferred<Response<T>> {