i too have known someone whom got it and had complete success and still is till this day..

to me it sounds like you have educated yourself on this path and know what you are looking at and what the ups and downs can be..
i think as long as you are sure and prepared for what ever comes with it you will be happy
i also think people should have some counselling before hand as this can be quiet life changing and can cause some issues...
i know the person i know that did it she lost so much wight now she needs to have surgery to remove excess skin etc but she is in love with herself now lol which is good..