Amazing!
First off, this game's graphics are really well done. I really enjoyed them, and these made them an even better game. Everything is shaded, the lighting is spectacular, just beautiful. I especially enjoyed the scenery in Washington.
Second, there is undercover jobs you can do, and races. Both of these reward you with cars to drive around.
Third, you can choose your own license plate, which is really cool. A minor detail, yes, but it's just something worth mentioning.
Overall, this is a great game, with cool cars, fun game-play, good graphics. I enjoyed it so much!