My doctor recommended the sleeve for me but after being on here and seeing so many people having revisions from band and sleeve to rny , I changed my mind. I only wanted to do this once and I wanted it to be something I knew would work. I believe with the sleeve it didn't help w heartburn and I had that so bad and opted for that which would be most helpful that being said, I love my surgery. I've lost a little over 70 lbs in four months and feel amazing. It's been rough at times but so worth it for my health and as long as you are diligent about your vitamins and medical diet, I wouldn't worry too much about being malnourished. I'm sure with my awful diet if junk before surgery I was much worse off