I had a gastric bypass to cause they wanted more of a permanent solution. It's important to realize that these surgeries Limit the Quantity of what you can eat but if you eat junk food even small amounts on a regular basis you will gain the weight back. I lost £127 and have maintained it for 13 years through following a strict eating plan. I know 5 women that had gastric procedure and all of them have gained back plus more.
It's important to realize why you want the procedure and what you expect to get from it. It is a tool not a cure. What are your expectations?