My brother had a bypass done about 14yrs ago. He went from 480 to about 240. He has gained some of it back, I imagine he is around 280-300, but nowhere near where he used to be. That said, he has told me that he wouldn't do it again. He had complications with the incision for a long time but the worst thing is that he now experiences something called "dumping" which causes him to have several symptoms including hypoglycemia. He has learned to control the hypoglycemia somewhat, but in the beginning, he suffered fainting spells that looked like seizures and caused him lots of problems with the DMV, his work, and medical insurance.