I didn't know that Intense School shut down. I went to them, too, but only after studying for about 4 months. I was pretty confident from my own reading and use of cccure, but then the in-laws decided to surprise me and buy the boot camp for me (a little insurance).
Larry Greenblatt was my instructor, and I thought he was one of the best I've had. Could I have passed without the camp? Probably. Was it worth it for the added confidence? Absolutely. I kept in touch with about 20 of the 30 folks from my class, and all but one passed on the first try. The ones who claimed to have had the hardest time were the ones who'd been in the business the longest. That whole real world vs. ideal world conflict in the brain.
Good luck on the retest. I'm not a huge fan of certs in general...at least as a way of flaunting what you (claim to) know, but having it has certainly opened doors for me. Living in the Baltimore/DC area, all the gov't contractors want folks with letters after their names.
Reluctant CISSP, Certified ASS