Unfinished, confusing, short, laggy, dull and boring. Need For Speed: Carbon is a rushed game, and very disappointing.
The gameplay is very linear, the missions is the same all the time, or at least, that's how it feels. The new wingman feature is also a flop, and irritating to listen to, but luckily you can race without them. The police chasing is very lame, you easily get away from them, when they finally is after you. I've completed the game, and I havn't got busted one single time.
The race missions are many, but don't let that fool you. I completed the game in 2 days, or approximately 12 hours. And the boss's is even more lame than ever, and there are only 4 of them. The canyon races is fair, but still unfinished.
You can customize your car in every way you want, even sculpt some parts, which works okay, and add a unique look to your ride. The FMV's are really boring, they lead you through the story which is something about a bag that was important, then he police came and the bag got switched and... Something like that, never cared about it, and you don't even get to know how it all ended. And besides, everyone is wearing the same dull futuristic clothing, it's so ugly!
Overall, an unfinished game, quickly completed, online play is laggy and confusing and lame. Go buy Need For Speed: Most Wanted instead, it's much better and longer. Or Motorstorm.