A neighbor of mine had it done. She has lost about 150 lbs over the past 2 yrs. Her biggest problem is that she still has a really hard time keeping food of any sort down. My other neighbor who had regular gastric bypass about 6 weeks later has lost about 100 lbs and isn't anywhere near as sick as the neighbor who had the gastric sleeve.
That said, I think the person best able to help you make your decision should be your Dr. That is who has the medical info necessary to help you choose the right surgery for you. I do think that any surgery can be successful for you if you are willing to change the relationship you have with food. The surgery is a tool to use in your weight loss journey and each type of surgery currently available has it's share of successes & failures. It's that change in the role of food in your life that the surgery will help you achieve that will make the difference in the long run.
Good luck with whatever you choose, and stick around here to let us know how you are doing & support you on your weight loss journey, wherever it may take you.
Nancy