What to expect in the steps toward weight loss surgery?

My dad had gastric byp (started at 450 lbs) and got down to 280 after surgery, but gained 50-70 lbs back on. Your stomach stretches back out so you have to make a lifestyle change after getting it. A pastor at my old church got it and had some complications, but lost a LOT of weight. He's maybe 160 lbs now. I would say it is worth the risks just from the problems obesity causes. If your insurance will pay for it, I'd give it a go.