Such a great mod this one.
You can have some epic battles with the AI around those famous US tracks like Mid Ohio, Laguna Seca, Belle Isle, Portland, Road America, VIR and Road Atlanta. These battles are probably as good as anything I've experienced within the sim.
The only issue really is with the durability. I had to turn off Mech failures completely to enjoy this. I'm not the cleanest in my gear shifting but it should be good enough to get me through most 20 min races that I do. It's particularly an issue on Oval with the Indy car variant, you can't drive a lap without smoke bellowing out of the back.
Another tip I would give to folks running this, is to not run with full flags, RF2 is so buggy with that I find, this is obvious not mod related but I tend to run with black flags only for the best experience.