block storage v1 comments
diff --git a/openstack/blockstorage/v1/snapshots/requests.go b/openstack/blockstorage/v1/snapshots/requests.go
index 7dcbc46..0e4e8f8 100644
--- a/openstack/blockstorage/v1/snapshots/requests.go
+++ b/openstack/blockstorage/v1/snapshots/requests.go
@@ -8,14 +8,20 @@
 	"github.com/racker/perigee"
 )
 
+// CreateOpts contains options for creating a Snapshot. This object is passed to
+// the snapshots.Create function. For more information about these parameters,
+// see the Snapshot object.
 type CreateOpts struct {
-	Description string
-	Force       bool
-	Metadata    map[string]interface{}
-	Name        string
-	VolumeID    string
+	Description string                 // OPTIONAL
+	Force       bool                   // OPTIONAL
+	Metadata    map[string]interface{} // OPTIONAL
+	Name        string                 // OPTIONAL
+	VolumeID    string                 // REQUIRED
 }
 
+// Create will create a new Snapshot based on the values in CreateOpts. To extract
+// the Snapshot object from the response, call the Extract method on the
+// CreateResult.
 func Create(client *gophercloud.ServiceClient, opts *CreateOpts) CreateResult {
 	type snapshot struct {
 		Description *string                `json:"display_description,omitempty"`
@@ -49,6 +55,7 @@
 	return res
 }
 
+// Delete will delete the existing Snapshot with the provided ID.
 func Delete(client *gophercloud.ServiceClient, id string) error {
 	_, err := perigee.Request("DELETE", deleteURL(client, id), perigee.Options{
 		MoreHeaders: client.Provider.AuthenticatedHeaders(),
@@ -57,6 +64,8 @@
 	return err
 }
 
+// Get retrieves the Snapshot with the provided ID. To extract the Snapshot object
+// from the response, call the Extract method on the GetResult.
 func Get(client *gophercloud.ServiceClient, id string) GetResult {
 	var res GetResult
 	_, res.Err = perigee.Request("GET", getURL(client, id), perigee.Options{
@@ -67,12 +76,15 @@
 	return res
 }
 
+// ListOpts hold options for listing Snapshots. It is passed to the
+// snapshots.List function.
 type ListOpts struct {
 	Name     string `q:"display_name"`
 	Status   string `q:"status"`
 	VolumeID string `q:"volume_id"`
 }
 
+// List returns Snapshots optionally limited by the conditions provided in ListOpts.
 func List(client *gophercloud.ServiceClient, opts *ListOpts) pagination.Pager {
 	url := listURL(client)
 	if opts != nil {
@@ -89,11 +101,16 @@
 	return pagination.NewPager(client, url, createPage)
 }
 
+// UpdateOpts contain options for updating an existing Snapshot. This object is
+// passed to the snapshots.Update function. For more information about the
+// parameters, see the Snapshot object.
 type UpdateOpts struct {
 	Description string
 	Name        string
 }
 
+// Update will update the Snapshot with provided information. To extract the updated
+// Snapshot from the response, call the Extract method on the UpdateResult.
 func Update(client *gophercloud.ServiceClient, id string, opts *UpdateOpts) UpdateResult {
 	type update struct {
 		Description *string `json:"display_description,omitempty"`