First thing to notice about this game I guess, is it's not pretty to look at, irregardless of how old it is. The landscapes are terrible, even for post apocalyptica, the cars are really simple, and the UI is downright terrible. Visually it really has nothing going for it. Even the sound is somewhat irritating.
BUT, you don't play this for aesthetics... You play it because of the amazing physics rich turned based combat/racing. Once you get used to the UI, this game really starts to shine. At the start of each turn you change steering, gears, weapon targetting, etc. and once it's all set watch the next 3-4 seconds play out. This gets hectic when you're racing against a large group of players.
The real beauty lies in how each action follows through subsequent turns. Made that hard right a little too hard? the next 3-4 turns will be spent countersteering, and when it works... oh boy does it work. Pulling off successful drifts, jumps, etc gives you a real sense of accomplishment. Combined with terrain realistically affecting your cars handling and you have racing that equals any AAA racing simulators.
I've been playing this on and off for the past 4 years, so don't let the steam counter fool you. I highly recommend at least trying this out. Once you get past the unfriendly UI and get to the actual racing, you'll have a hell of a time.