diff --git a/field_collection.migrate.inc b/field_collection.migrate.inc
index 756fcea..6b37bbb 100644
--- a/field_collection.migrate.inc
+++ b/field_collection.migrate.inc
@@ -4,9 +4,9 @@
  * @file
  * Support for the Migrate API.
  *
- * Your field collection migration should be run after the host entity migration.
- * For example, if the collection is attached to nodes via a field named
- * 'field_attached_data', and if the nodes are being imported by
+ * Your field collection migration should be run after the host entity
+ * migration. For example, if the collection is attached to nodes via a field
+ * named 'field_attached_data', and if the nodes are being imported by
  * ArticleMigration, your collection migration class constructor should look
  * like:
  *
@@ -54,7 +54,8 @@ class MigrateDestinationFieldCollection extends MigrateDestinationEntity {
   }
 
   /**
-   * Returns a list of fields available to be mapped for this collection (bundle).
+   * Returns a list of fields available to be mapped for this collection
+   * (bundle).
    *
    * @return array
    *  Keys: machine names of the fields (to be passed to addFieldMapping).
@@ -70,29 +71,31 @@ class MigrateDestinationFieldCollection extends MigrateDestinationEntity {
    * Import a single field collection item.
    *
    * @param $collection
-   *  Collection object to build. Pre-filled with any fields mapped in the migration.
+   *  Collection object to build. Pre-filled with any fields mapped in the
+   *  migration.
    * @param $row
    *  Raw source data object - passed through to prepare/complete handlers.
    *
-   * @return array
-   *  Array of key fields (item_id only in this case) of the collection that was saved if
-   *  successful. FALSE on failure.
+   * @return array|false
+   *  Array of key fields (item_id only in this case) of the collection that was
+   *  saved or FALSE on failure.
    */
   public function import(stdClass $collection, stdClass $row) {
     if (isset($row->migrate_map_destid1)) {
       // We're updated an existing entity - start from the previous data.
-      // entity_load returns an arraym, we get the field collection entity with array_shift
+      // entity_load() returns an array, so we get the field collection entity
+      // with array_shift().
       $entity = array_shift(entity_load('field_collection_item', array($row->migrate_map_destid1), array(), TRUE));
       $updating = TRUE;
     }
     else {
-      // Skip the collection if it has no host
+      // Skip the collection if it has no host.
       if (empty($collection->host_entity_id)) {
         throw new MigrateException('Could not find host entity of the field collection to import.');
       }
       $entity = entity_create('field_collection_item', array('field_name' => $this->bundle));
       $updating = FALSE;
-      // The host entity cannot be reset - we only set it on initial insert
+      // The host entity cannot be reset - we only set it on initial insert.
       $host_entity = reset(entity_load($this->hostEntityType, array($collection->host_entity_id), array(), TRUE));
       $entity->setHostEntity($this->hostEntityType, $host_entity);
     }
@@ -135,8 +138,8 @@ class MigrateDestinationFieldCollection extends MigrateDestinationEntity {
 
     $this->prepareRollback($item_id);
     $field_collection_item = field_collection_item_load($item_id);
-    // If the collection wasn't imported we can't roll it back so check if the
-    // loaded object matches the fieldcollection item class.
+    // If the collection wasn't imported then we can't roll it back, so check if
+    // the loaded object is an instance of the FieldCollectionItemEntity class.
     if ($field_collection_item instanceof FieldCollectionItemEntity) {
       $field_collection_item->delete();
     }