I've watched a few hours of a guy playing P4DAN on the PSTV. He didn't really mention any input lag, but I've noticed that the story is... different. I figured it would just be a dancing game, but, no, it's got quite the story to it, too. And lots, and lots, (and lots) of fanservice. Including most of the girls' extra sounds in their dances consisting of only "oohs" and "ahs". Even Nanako a little bit, too. It kind of creeped me out a bit. Having said that, though, the music is still top notch (would be better if you could turn off in-song character speech), and the gameplay seems to be on par with most rhythm games that aren't Project DIVA. But Rise's voice actress changed, and the new one, while not bad in most of her roles, really does NOT fit Rise. Every time she talks I want to scream in terror.