http://www.youtube.com/watch?v=UOe3GKOAP-I
So I played the demo on the Vita the other day, and I think it's a fun game. When it actually bothers to work it's a fun fast paced running adventure game where everything just flows if you're good at it.
Otherwise you're getting Sonic 06 levels of loading times, slowdown, and stuttering, more than once I wanted to just put the game down cause it wouldn't fucking work properly...
But maybe that's just the Vita port...