Agree with the reply to research research research and make your own decision. The main things I found after a couple of yrs research was that the band is less invasive and less tramatic to the body. And it is reversible if some sever illness or complication occurs. The bypass is not reversible if there are severe problems. I chose banding because of existing medical conditions and felt it would be less of a risk of complications for me. However the results have not been what I expected so I decided to join this forum to see what others have experienced.