I've been to one of their events at the Z-Hills location. There are some pics on this site somewhere...or atleast were.....I posted them, so you can do a search on me if you want.
Anyway....I had a blast! Fast and fun track! Although the surface is a bit negelected and dusty. You'll be glad you attended. A pretty decent variation of cars show up too. I thought it would be all Porsches and Bimmers (a lot of those also.) Infact...my sig is a pic taken there.
Bring stickey rubber...shade and plenty of water....you'll need it.
Its also a pain in the butt to find the track. When you get to the dead end/ dirt looking road...that's where you go. It looks decieving. Have fun, good luck. Wish I could make it...oh well.