This game easily the most brutal and unforgiving game I have ever played. If you can mange to get it to stop crashing and freezing your graphics card, you will be treated to ridiculous elasticy physics and frustrating glitches (like your bike folding in half on a regular basis).
The learning curve is extremely steep, which is reflected by the nearly impossible achievements. In order to become half decent at Trials 2, you will need to study replays and practice infuriating sections of track for hours on end, and even then you have no hope of touching the leaderboards.
So unless you have a lot of time on your hands, and like extremely difficult challenges, think again before you choose this game.