I was a bit put off by this game the first time I played it. I'd been playing a lot of Burnout 2 and this game is a lot of hardwork compared to that arcade style.
Once I'd put a few hours in though, I really got addicted to it. The delicateness required to get the cars round the track is delicious. You really do have to learn to guide the cars properly and learn to get proper lines.
I would warn people that this game is only suitable if you willing to spend a lot of time repeating the same track trying to get things perfect. If you are likely to get bored by that, you might not like the game.