I'm 35 and had gastric bypass. Started at 425 with diabetes, high cholesterol/triglycerides, high blood pressure... and probably sleep apnea though never tested. I just passed 6 months out and have lost around 150 pounds. Best decision I ever made. Daily life is 10 times easier. My surgeon had no reservations regarding doing surgery. I did the standard 2-week liquid pre-op diet that he prescribes to everyone. It was tough, but I stuck to it. Surgery was one morning, and I was released the next day around noon. Was off of pain meds within 2 days... and back at work (desk job) by day 6 post-op
Weight came off quickly. I've never had any serious complications. Never had issues introducing new foods when my post-op diet allowed for a new phase. Only time I ever dumped was when I overate a little bit due to eating too fast.
Energy is through the roof, I'm off of most of my meds, and will likely be off all after my next checkup. I sleep much better, and apparently hardly snore anymore. I've gotten back to doing things I haven't done in 10+ years, like assisting on the ice with my kids hockey practice. I no longer worry about stuff like "does that restaurant only have booths" or "I hope they don't have folding chairs at my kids school play." I've flown on an airplane again no needing an extender and with the arms down. I don't sweat the minute the temp rises above 65 deg F (in fact I'm cold all the time.) Sex is much better. I could go on and on. Only negative thus far has been my weight loss has started to slow at 6 months out... but I also am not putting much effort into working out, so once I kick that up, I'm sure it will improve.