This game is really a lot of fun.
I've been a fan of the old Hot Pursuit games and this is a really decent addition to the series.
If you liked those games you will like this one as well, it pretty much sticks to the original format, there are races where you're a street racer, and others where you play as a cop.
Only major difference is that you can charge up your nitrous through various actions on track, much like Need for Speed Underground 2, and this is necessary, since it helps you out a lot.
You also have kind of a level-up system, one for the racer part and one for the cop part.
Each race you're arwarded medals, which give you bounty (basically experience) which level you up and unlock cars and other stuff.
You have your gadgets like spike trips and others (need to unlock them though I think) to stop cars much like the old games.
Other than regular races, where you have to escape from cops / bust racers, there are also some times trials, which might seem boring to some people, but I personally enjoy this kind of challenge.
I found it a bit hard to get used to the controls though, braking and drifting just right is a bit hard with my wheel.
The only real letdown for me - There's no manual transmission. Why? Some people say the game is to hectic, especially during chases with racers/cops, but that is something I absolutely want in any racing game.