If you have to change your eating and exercise habits for life is there any advantage to the band ?
That's a good question, lady.
I have spent a lot of time wondering this myself. Having a weight loss operation seems an odd thing to do because it does not address the real issue; that you are eating too much for your lifestyle. It just forces you to 'fix' your overeating temporarily but, as Earlybird posted, does not 'fix' your actual behaviour in the long term. You can only do that by freely practicing it on a daily basis, without the restriction of a band forcing you to do so.
I have in the past lost 8 stone using one of those meal replacement diets that are very popular just now. Sadly, reaching a glorious size 10 did not stop me regressing and putting it all back on again. Why? Because I followed the plan perfectly, never deviating, always compliant, always successful. Then, after reaching goal and reintroducing food again bad habits crept in, slowly and insidiously.
Earlybird, you ask your two friends how it was for them. I bet they'll tell you a similar tale.
I think that eating less is the only way to be successful long term. This amount of food will vary for all of us but generally our portion sizes need to reduce. I know I have spoken of this before but I got a lot of help and advice from a book called Eating Less. In a nutshell it tells me to take responsibility for what I put in my mouth, to always make a free choice about what I eat, and to be absolutely clear about the consequence to my health if I make the choice to eat something for reasons other than hunger or nutrition.
If there are people successful in the long term after weight loss surgery, they have made the mental changes necessary for success. Same for long term successful dieters. Most people don't have long term success with dieting though, that's why we have such a massive £multi-billion industry.