I think a lot of it is relative to your prior experiences. I've had broken ribs, a broken pelvis, open hysterectomy, a total knee replacement, thoracic surgery to remove a tumor from my esophagus, and two babies. ALL of these had far more pain than the RNY. RNY was a piece of cake. Yes, there was soreness and pain for a week or two, especially on our bumpy road, but each week got better and easier. I needed a couple doses of morphine during the first night in the hospital. After I got home, I took a couple doses of Tramadol and then it was liquid Tylenol only. I started walking right away and was up to 10,000 steps by the end of the first week. I was really worried about gas pain. I don't know why that concerned me so much, but I never had any gas pain at all, which was great.
If you got through the sleeve OK, you will be fine with RNY.