Its OK but....
The level up system is quite a good idea, however it is basically the same for racers and cops.
The levels are well laid out. Tracks are nice. I will say it was a nightmare to get started. I like a game I can put in the tray and just play. This took ages to get to an actual race. you HAVE to sit through cut scenes, and before that I had major issues with security (it kept on forcing me to confirm my Xbox live account)
I would have liked more options to modify the cars, and maybe a better car dynamic than "Oh look I have unlocked the next level"
I will be honest and say I did not play it online but I have no intention of doing so. I have played it for a few hours, and that was enough for me.
In conclusion, OK game just not for me!