Played the demo on Xbox and didn't really like it, I think it's the type of game that won't click with me until I put a few hours into the retail version but I couldn't help but get a bad vibe from it. It's SSX in that it checks off most things you'd expect from a SSX game but something about it feels off.
The choice to run the game at 30FPS is a stupid one, the animation in particular suffers badly from it and it's just not the same without that trademark 60FPS.
I might have to pop in SSX 3 on the PS2 to see if it's still as great as I remember it being.