I must say that I am not in favour of WLS, either. I think, as one American bariatric surgeon said, that you simply exchange one set of health problems for another. I have a friend who needed a 'takedown' as she was so desperately ill. There are very few studies that we allowed access to that show the failure rate, and the many problems a few years down the line, yet those studies, and figures, exist.
As Emma says you can get the same results with Atkins and avoid messing up your insides. Obviously this is your decision and you may not agree with me but when you take 'advice' from the people offering the surgery you may be given a sanitised version. After all they do not actually know how things will work out with you, individually.
Please get as much information as you can. There are two yahoo WLS groups you can join - one of them is ossg gone wrong, the other, ossg uncensored. Real people who have had surgery discuss the problems they have had. This helps to counterbalance the cheerleaders. Even Carnie Wilson, the WLS poster girl, has regained her weight and is asking Dr Oz for help now.
I know many swear by surgery and if they are doing well on it, great. It's the ones who don't do well, and there are tons of them, that I am thinking about right now.