A definite rental for me... also, is it just me or did Warner Bros (and another company who escapes my tongue just now) overly sexualize the female villians a little too much. Damnit, where's Harley Quinn in her original black and red jester's uniform... now it's a slutty nurse's uniform. And Poison Ivy... she's barely wearing anything at all, just a leaf she probably stole from the garden of Eden and a small buttoned shirt. Well, at least WB didn't screw up the costumes for the males (i.e. The Joker, The Croc, The Scarecrow).
Love the stealth element too, like hanging upside down from a gargolye statue and jump kicking an unsuspecting enemy in the back of the head :D.