I am an obese person, so I definitely understand about living in a body you hate. At the beginning of this year my BMI was 39.6, so if I was in the US I would probably be considered as a candidate for the surgery. However, I'm glad that I am in the UK and gastric bypasses are not so common here.
I would never have the procedure done. I've read a lot of information about it, a lot of it written by people who have gone through it and are delighted with the results.
However, IMO the risks are just too great and in most cases I strongly believe that there is a root cause that can be dealt with and if it is not dealt with eventually it will lead right back to the same problem, or other problems. In some cases this root cause can be medication, but I simply can't believe that there's not another way. In the majority of cases I don't believe that being overweight is the "fault" of the individual involved. Admittedly a few people just don't care about themselves, eat rubbish and never do anything remotely energetic, but most people are not like this. Even if it appears that someone is "choosing" to make themselves overweight, it's often just a symptom of another issue that they are dealing with; be it physical/medical/psychological or whatever.
From what I've heard about "dumping" and other common problems related to GB surgery, physically restricting what and how much you can eat just does not seem to be the answer.
However, I also think that there is a lot that is not yet understood about the issues surrounding weight control and why some people have such a problem with it. I know there are, for example, medical conditions which mean people never feel full, which inevitably leads to excessive weight gain. I hope in the fullness of time more will be discovered on the subject and there will be better solutions than GB surgery.
I've reduced my BMI by 4 in the last 11 weeks, (which represents a loss of 25lbs), and I am continuing to battle my weight, but there's no way I would consider GB surgery.