Great, but...
The variety of cars is great and if there's a livery you want but the game doesn't have all it takes is maybe 2 hours making a skin in photoshop. The car models look great, but the environment (such as trees off track and such) looks terrible. It's like GTA graphics off track.
Sound is very, very good, which is something to expect from SimBin. There are only a few minor problems with the sound and that is with the car sounds. The TVR T400R sounds nothing like the real one (the real TVR T400R has a wonderful I6 sound) and the C5R sounds downright terrible. Luckily there are some very devoted players who have made sound packs to get your GTR2 cars sounding right :]
If you look in the right places you can find some great user created cars, such as the DBR9 or C6R, and you can find all sorts of skins for your favourite cars.
(Race Sim Central Forums is a great place to look)