Need for Speed ProStreet isn't a great game, but it still is fun to play.
At first it's boring, but as soon as you get OK cars the game becomes fun to play. It is fun to play, you can customize your car however you want, the game is very long, etc.
Played it for two weeks straight and got bored because it was so long I did not want to finish it.
It's fun to play, it'll keep you entertained a bit, but it doesn't keep up to other games as Toca RaceDriver 3, Dirt, grid or anything else. It has great graphics if your PC can take them, but for me it just didn't played well unless I put it to a 640x480 ugly resolution which was an awful experience.
Maybe I would had loved it more if it worked better and if I had a better system.
Overall, it's not bad but it ain't great either.