I have been researching this surgery for over a year. I am 66 years old and have serious knee problems and other than that I am in relatively good health except for being so overweight. But at my age I am lets say nervous about major surgery and nervous about being over a 100 pounds overweight and what it is going to do to my health. I don't have the co-morbidities at this point and my insurance won't cover the surgery. But my knee doc won't do the second knee replacement until I lose the weight. Spiral here out of control can't exercise much and have to lose a 100 pounds to get the surgery so I can. Being my age many docs won't even see me. But my real defining deal was I want to know that in the unlikely event something does go wrong I want someone who has experience in trauma medicine and who will hit the ground running to save me. Both of these docs are great or they would not be with Bariatric pal but Dr. Altamirano has that background in trauma medicine and not at any hospital but at one of the largest in Guadalajara, So if I am going to put my life in one of their hands I am choosing the one who has had to deal with Trauma medicine and is certified in that area. That was my deal maker. I am sure you will find a great experience with both of them. Go to their forums and talk to the patients there both present, past, or like me near future. You will realize we are a family who all pray for each other and celebrate milestones and offer all sorts of advise or shoulders to lean on when we hit walls. Dr. A. is in the group daily and answers questions almost as fast as we ask them. It is such a relief to find a kind, compassionate, caring and understanding doctor who is there for us not as docs here in the USA are but as a person who is really there. Gotta love the security that gives us!!!