I found this game to be awsome on the PC.
The tranistion bewtween Multiplayer and Single players is unique and seemless. You can be playing online and without exiting the game, 1 touch and you are in single player madoe again.
The Keyboard controlls are rubbish but with a good controller, (I use The logitech dual action) its easy and a lot of fun.
The mountain are huge. You can ride for hours and harldy do the same run.
This fact alone for me makes the game worthwhile. You also have lots of choices in regard to clothes, boards etc and this is surprisingly addictive
Killer sounds track but after a while, I prefer to crank my own music and just ride.
Its simple enough for my 6 year old son to play and have fun and challenging enough for me as well completing the tasks.
I just hope they release new Mountain.
I dont know about the Xbox version but the PC version is pretty good. Im getting it on the Wii as well because its a great game to play with the Wii fit board.