Mate has – worked very well for him. Lost shit loads of weight and he says its not that bad once you start. You get rest days and a real mix of excercise through the week to prevent boredom.
The infomercial thing is quite entertaining (when drunk). Thing is with these things is that if you commit, they are great! So how strong is your willpower 🙂
Also, personally, I find the 2 day fast thing works very well for me as well as upping cycling to 4 times a week. Lost almost 8 pounds since starting three weeks ago and feel much better. Would prob be more but no way am I giving up ale and wine – life is just too short.
Good luck