done it a few years in a row....got kicked out once (with a standing ovation) for doing a hot lap in an infinity..over estimated the brakes and killed a bunch of cones
one year the 'vette was boring, you couldn't get on it at all, they had some a-holes in scooters driving next you while you drove solo....
last year they had a semi-pro in the passanger seat and they you open it up and have some fun...choice of auto and sticks....decent car, I wouldn't kick one out of my driveway
GM sucked the life out of Saab....they now drive like a Chevy Caviliar