This is maybe my new FAVORITE RACING SIM. (Aside from Gran Turismo being my favorite Sim series)

I use Project cars for Time Trials, Curcuits, Sprints, and Endurance Races.

Project Cars has the biggest track selection i've ever seen in a racing game/sim. When setting up a race, you are able to edit and adjust numerous setting and features for that race. Time and Weather can both be set at a fixed position or can be set to have multiple different weather and time changes that occure during the race.
EX: You can have the race start during the day and end when its night time, as well as having a rain storm swoop over the track for a specific amount of time. The combinations are endless.

Each car can be tuned individually, as well as your STEERING WHEEL SETTINGS! Thats right, you can apply different force-feedback settings for each vehicle.

Ai is another story, for the most part the Ai is fantastic and always races with a mix of lenience and aggression. Some Ai will drive as if they struggle with the track, struggle with the car, or just flat out suck ass at driving in general, and other Ai can be as agressive as kid on Forza trying to ruin your tandem drift. Thus meaning they are very well at keeping their racing line and following it, they not afraid to slip by if you give them too much room, and near the end of a race they might try to make some last resort moves in order to take 1st, 2nd, 3rd, etc.

*Im gonna give a detailed example of one gripe I have about the Ai:
- When overtaking someone on either the outside or inside, you would know to respect eachothers racing line and try to keep it as clean as possible. Well I had an incedent where I was doing a 30 Lap race at Bathurst and I was in 3rd, about to take 2nd. We both we coming up into a left hand corner and I happened to take the inside line, but he was at my same pace yet on the outside line. I went to turn into the corner, keeping my side of the lane, and then out of nowhere instead of the Ai keeping his outside line to make the corner clean, he just turns into the inside like a freight train and takes us both out. In the real world this wouldn't have happened, but what can you do its a game/sim anyways. Thats really my only gripe about it, yet it only happens every so often. And not to only me, Ai will do this to other Ai and create collisions and pile ups.

On the other hand, Project Cars is still a must buy!!