The first 3 months, the weight fell off, and I lost 50 pounds. After that, it was a lot slower. I found that I had leveled off, and stopped lossing about 3 months ago. So I then decided to watch what I eat more carefully, and with the work in the gym, I have lost 15 pounds in 6 weeks.
I have a friend who had the same surgery, but has started gaining weight again. But I saw that when I was with hime, he is eating twice as much as I do, and eats a lot of meat. This surgery is a tool, and not going to work in the long run, if you don't take care of yourself. If you eat crap, you will start to gain again. If you over eat, you can start to stretch out your stomach, and increase the volume again. But I found this surgey to be a great way to get my weight under control, and to start to make the lifestyle changes to keep the weight off.