The CART 1988 cars were challenging and fun to drive. The GTPC update brought new life to an old mod. This is at an even higher level, wow. What a great port and upgrade from the original rF2 mod, also addressing some of the woeful 3D models. When even driving one of the lesser rated cars is fun, you know the mod is good. I have not gone as far as drive toooo much yet so I can't speak to the consistency of car failures but I am looking forward to racing this online as it was not done catering to single-player - though a future update would be more than welcome since AMS is not a popular online platform.
For people giving poor reviews as they can't get the game running, you have to download both files (check the history tab). If you still manage to have issues, use the support thread instead.