diff --git a/response.go b/response.go
index bf3f4cd1..efa51aef 100644
--- a/response.go
+++ b/response.go
@@ -6,13 +6,17 @@ import (
 	"time"
 )
 
+// StatusSent is a 200 response.
 const StatusSent = http.StatusOK
+
+// The possible Reason error codes returned from APNs.
+// From table 6-6 in the Apple Local and Remote Notification Programming Guide.
 const (
 	ReasonPayloadEmpty              = "PayloadEmpty"
 	ReasonPayloadTooLarge           = "PayloadTooLarge"
 	ReasonBadTopic                  = "BadTopic"
 	ReasonTopicDisallowed           = "TopicDisallowed"
-	ReasonBadMessageId              = "BadMessageId"
+	ReasonBadMessageID              = "BadMessageId"
 	ReasonBadExpirationDate         = "BadExpirationDate"
 	ReasonBadPriority               = "BadPriority"
 	ReasonMissingDeviceToken        = "MissingDeviceToken"
@@ -49,13 +53,34 @@ func (t *timestamp) UnmarshalJSON(b []byte) error {
 	return nil
 }
 
+// Response represents a result from the APNs gateway indicating whether a
+// notification was accepted or rejected and (if applicable) the metadata
+// surrounding the rejection.
 type Response struct {
+
+	// The HTTP status code retuened by APNs.
+	// A 200 value indicates that the notification was succesfull sent.
+	// For a list of other possible status codes, see table 6-4 in the Apple Local
+	// and Remote Notification Programming Guide
 	StatusCode int
-	Reason     string
-	ApnsID     string
-	Timestamp  timestamp
+
+	// The APNs error string indicating the reason for the notification failure (if
+	// any). The error code is specified as a string. For a list of possible
+	// values, see the Reason constants above.
+	// If the notification was accepted, this value will be ""
+	Reason string
+
+	// The APNs ApnsID value from the Notification. If you didnt set an ApnsID on the
+	// Notification, this will be a new unique UUID whcih has been created by APNs.
+	ApnsID string
+
+	// If the value of StatusCode is 410, this is the last time at which APNs
+	// confirmed that the device token was no longer valid for the topic.
+	Timestamp timestamp
 }
 
+// Sent returns whether the notification was succesfull sent.
+// This is the same as checking if the StatusCode == 200
 func (c *Response) Sent() bool {
 	return c.StatusCode == StatusSent
 }