Personally I am getting really tired of the Michael storyline. Michael, like Kolya, is an overused nemesis and needs to be finished, especially now we know that this is the final season in the Atlantis series. Granted there may be movies but there are just too many storylines that aren't finished and the writers are running out of time.
This episode reminded me of the movie Pitch Black, so i kinda thought the story was unoriginal. Also many of the main characters did not appear in this episode (I was a fan of the all girl off world team) but no Ronon, Teyla, Dr. Keller or large appearance by Dr. McKay. So all in all kinda boring and a waste of the limited time Stargate Atlantis has left on the air.