Yeah it was fun, but it would have been more fun without all the restrictions. The cars were only autos, you couldn't go over 6k rpms (redline was 8k), couldn't pass other people who were driving slowly. I think I had more fun driving my Z on the track, but it was still an awesome experience.
It was a TravelZoo deal and the cost is based on how many laps you bought. It was 1 for $100, 2 for $150, etc. The track was really small though so each lap was like a minute long. I bought 2 laps, but got another 2 free because they had to reschedule my first reservation.
The track is only open for testing on certain days, this one is usually on Saturdays. It's open till 4 pm so you might be able to make it. Don't go there very often since it's an hour away from me, so it will only be this Saturday. Probably won't be back there till spring time.