I had originally wanted the lap band until I started talking to people who had it and figured out it wasn't a good option.
I figured I only needed restriction as I am able to lose weight without needing the mal-absorption. my metabolism hasn't been wrecked by years of dieting since I basically gave it up in my 20s and only slowly gained weight, unlike so many who diet, lose, then regain over and over - "yo-yoing" up and down. but that is just a guess.
we can advise you a lot better if you tell us more about yourself. have you dieted a lot? have you tried lo carb, such as Atkins? what have you done to try and lose weight?
in general, people should get the surgery that will work for them long term!
"least invasive" has been used to sell the lap band but that surgery should be illegal, so I don't like the phrase.