I am about 6 weeks out of my revision from lap band to bypass and from my experience it is way different. It is a whole new way of learning to eat and seeing what you can tolerate and what you cannot. I do not get the 'full' feeling like I did with the band and I am bummed about that. I am learning that I am getting a new 'full' feeling that I am getting used to that has started to help me now that I have experienced it. I don't know if I have had dumping or not. I have had frequent diarrhea getting used to foods but not sure its technically dumping. I haven't had it in connection with consuming sugar or the sweaty, racing heart thing. I have started to lose weight and I am happy about that part but definitely a different process than the band. Good Luck to you!