Car has seen Chuckwalla, Fontana, and Buttonwillow. All rather tame, in my opinion, and I had no issues. The only thing I'd want to change right now for future venues is square vs. staggered setup, and tossing some more track appropriate tires on the car. Brake fade wasn't an issue (running my second set of OEM's on both the front and back), and even without the M suspension (sport suspension, yes, but still...) body roll on tight turns at speed was nominal. Very tight.
FWIW, I stayed in manual the whole time. That's the way I drive the car 95% of the time, anyway.