I'm a member and have done a trackday with them at Buttonwillow in April. They were really fantastic. Great prices and they were all very professional. Dave Moss was there and set up my suspension, since then, I fell in love with my Gen 4 all over again. It was nice being the only guy with a Gen 4 that day. I was the talk of the paddock, right next to the guy with the RSV4.
As far as becoming a member, it wasn't that bad at all. I'm in the military, so filling out their paperwork was easy. It'll be nice when I go to apply for another trackday, I can just input my username and password and buy the session without having to re-input all of my info.
I'll definitely be doing trackdays with them again.