Hi Shauna, Welcome to the group.
I had bypass surgery in 2008, before the laparoscopic option was available, so it was an open procedure for which I had to be hospitalized for a few days. I also was accepted into a university study and was followed up on for many months to track my progress. I lost 110 pounds in that first year. In fact I lost more weight than I wanted to and had to gain some back. I'm 5'4" and for some reason I'm drawing a blank on what I weighed, but it was more than 200 pounds, and I remember at one point I weighed 260 pounds.
If you read through the posts here over the last 10 or 15 years, you'll find a lot of details from people who've had both procedures. I know a lot of them were successful in keeping the weight off. When that happens, people tend to disappear from the group, but in my recollection, it wasn't because they regained, but it was just them moving on with their lives.
If I was having the surgery now, I'd definitely go for a laparoscopic bypass procedure. This decision is based on my membership here, reading hundreds of posts about both procedures. I think people are so lucky to be able to choose the sleeve, but it sounds to me like it's not reliable in the long term. I was in my 50s when I had the bypass, and it was the best decision I ever made, relating to my health.
Of course, you can find hundreds of posts who benefited from the opposite choice. But in general, you can't really lose when choosing weight-loss surgery. The bottom line for me was an end to dieting and fretting and self-loathing, including an actual sense of acceptance of my body image, no matter if I gained or lost a few pounds here or there. It also resulted in my passion for hiking in the North Cascades, which I still do at the age of 74.
It changed my life in so many positive ways, I can't count them all.
I wish you the best on your journey.
diane