My Wife Is Scheduled To Have A Gastric Sleeve Weight

My Wife is scheduled to have a Gastric Sleeve Weight Loss procedure in about 30 days. She has been pre-diabetic on and off for 3 - 4 years and presently is on medication due to a high blood sugar level. She is 48 years old, is 5'7" tall and weighs approximately 222 lbs. Her BMI is around 35. I'm trying to get her to consider other options but she is set on having the surgery. She has attempted to lose weight in the past and suffers from depression. What are your thoughts on this? Her primary care physician will find out next week in that he has to sign off on this procedure as does her psychologist.