I've done McGuire and agree it helps. My problem with it was the cult-like obsession with it. I was doing well keeping up with my daily calls with my coaches, attending online video chats etc. Until one day my coach rang me while I was at work and wanted to do a 3 way video call with another coach, I said I was working and was quite busy that day so couldn't do the video call. I never heard from him again. I know quite a few people who relapse after a few years as well.