Among the features are 8 cue points for each of the two decks, 14 effects controlled by X/Y pad, and excellent beat-matching. Beat-matching and pitch-shifting often give other DJ apps a lot of trouble, but CrossDJ is able to handle both nicely.
Aside from the X/Y pads for the effects there is little to distinguish this as a iPad app. It does a very good job of emulating modern DJ software, while maintaining virtual platters for scratching, but it doesn't really do anything new to take advantage of the iPad platform. There is also no option to record your sets.
Disclosure: I received my copy for review from MixVibes.