Gotta say, the voice work is excellent (which is quite rare in indie games like this) and the characters pose an interesting variety. The art of the girls is also top-notch.
One thing that's kind of a letdown (aside from how grindy the game feels sometimes - it does not provide the longevity, frustrating the more impatient players instead) is the arena mode rewards. Wish the images unlocked there allowed more interactivity rather than just demonstrating the jiggle engine. Doesn't have to be a minigame of its own, though having the level of interaction that the main mode girls have would be nice.