I looked around, initially thinking Insanity. I'm really intimidated by it, though. Looked at Turbo Fire and the new Les Mills Combat. I read all of the reviews of Insanity, and the reason I'm scared is that most said they were already in excellent shape doing it? Turbo negative reviews are just that it didn't work or repetitive; and, of course....they would rather do Insanity. Nothing on the Les Mills Combat. I spin 3x times a week and still need to lose 20lbs. I would consider myself rather weak. Opinions?