from having a gastric bypass, i can tell you that there are a few negatives. after the surgery, my hair got very thin and a lot fell out b/c the decreased amount of nutrition being absorbed by your intestines. I still very often get diarhea, upset stomaches and dumping with almost any combination of dairy and sweet. also, after a while the stomache stretches and you cant adjust it like the band. I hope this was helpful. good luck!!