Without a doubt, this is one of the best mobile games out there. It is well worth the money and is highly addicting. You will always have the urge to keep playing the game. It is great if you are bored because it takes about two minutes to complete each track.
Pros- Download new cars and tracks, cars look good, handle like they should, and are real, unlocking new cars and tracks is fun, comparing your scores with other people is great too.

Cons- cops get a little annoying when you are wanted badly, some loading times, if you have two nitrous, it is hard to stay on the track.

Overall- If you do not have it, buy it for your cell phone. It is worth it.