StateShift is the worst racing game for the PSP, and the gameplay is very annoying. Great graphics don't reflect the gam
The gameplay is annoying for starters, with you for most tournaments have to take a tutorial do to a certain move. It also takes quite some time to catch up to the opponents in the later levels, and the controls aren't what you would call comfortable.
The good thing about this is that it is inventive, in it's own ways. The multiplayer is good, as you can race against a friend to see who has the more powerful StateShift. Not as fun as Burnout: Dominator on PSP though.
Overall, if your looking for a decent racing game for the PSP, go with Burnout: Dominator or save your money up for Wipeout: Pulse.