A great game, 4 those with time to wait!
The championship is also rewarding, in strict sense, since winning races give you more parts to make new ATVs! By the way, as you can make your vehicle from the basis, it's a good "mini-game", cause in terms of racing, you just need 2, one fast and one good 4 tricks!
But these good parts don't make you forget the worse part, that are the loooong loading times, that happens pretty often. one good example you have when you open the game, you'll have the 1st opening screen, and then one long loading, then you'll receive a cinematic (a very good one), and then one more load to open the main menu.
Other down point is that you have a lot of pilots, but changing them don't change anything ingame! you can play with any pilot, it'll seem like the same.
Resuming, it's a great game, prety and solid, but with some flaws, and made for people pretty patient.