People seem to like it.
http://www.chud.com/43113/festival-review-detention-sxsw-11/
http://twitchfilm.com/reviews/2011/03/sxsw-2011-detention-review.php
And while some aspects certainly work better than others it's to Kahn's credit that he manages to maintain the hyper kinetic pace and bizarre logic in which elements lifted straight from Disney teen classics, The Breakfast Club, and the work of David Cronenberg nuzzle up to a teen romance and a time hopping plot to end the world and it all actually makes sense.
Also, the director figured out how to make Dane Cook funny.