I know a few people who have done it, one was happy at first but now that she lost the weight she hates it for three reasons.
1st, everyone (including me) who hadnt seen her for a while (year) didnt recognize her. She was like 350ish, now shes down to like 130.
2. The excess skin... I didnt even ask any more questions about this one.
3. She cant eat anything now, I never got any specific details but nothing carbonated, certain types of food you cant eat, and the amounts are stupid small amounts, I think she said smaller then the size of her fist.
Shes stuck with it now though, wishes she just did it by diet and excersize.
Bottom line, unless your like 600+ and ready to blow, stop being lazy and start moving around. People will try anything BUT diet and excersize & wonder why they dont lose weight.