I haven't started it yet,but I'm going to buy it! I've been doing a lot of research on it. I don't know I feel about the supplements part of it....but I found some people selling un opened dvds on craigslist for 40-50 bucks.... I want to give it a try. I did krav maga,boxing and an extreme fitness class. I'm ready to kick it up a huge notch. Also I've seen some pretty big people do it...so if they can do it I can do it!