I played it a little at
D23, nothing in 3D though. they were actually selling it there for the entire expo.
it's pretty neat, lots of new games. a couple of bugs it seemed, but nothing i couldn't deal with. control was really simple. other than occasional gestures for bonus points, it's really just pressing the A button repetitively. it doesn't even consider accuracy.
the only issue I really has was being distracted by the projectiles. I kept forgetting to watch my own crosshairs to see where I was shooting.