I know three people who had it. 2 died young. There was also substance abuse but one was my aunt and the doctor did say the surgery and subsequent malnutrition it caused contributed to her death. She died of liver failure at 53. The other is her sister and she is not in good health either though she has lived clean. She is trying to take very good care of herself now.
I have never seen someone get the surgery and then proceed to lose weight and look good and healthy.