I was very impressed by this game and it's worth the money!
Single player are very nice and the difficulty level, are very high in the beginning. The gaps-races, where you have to do 60 tricks in different maps, are very nice and there's many funny ways to do insane tricks! In single player you also have the opportunity to buy thousands of different things, like suits, helms, boots, bikes, ATVs and so on. Also the multiplayer part, are very nice and you can choose to play even as split screen or on Wi-Fi, it's not a long lasting multiplayer, because you only drive against each other, but it's nice to take a little offroading once in a while.
The stunts you can make are very nice, there are many different kinds depending on what side you move the controller.
The controls works perfectly fine and there are many ways to control it. The only bad thing about this game is that the maps look like each other very fast.
I was very impressed by this game and it's worth the money!