I know of a few people who have had MAJOR surgeries in TJ because insurance wouldnt cover it, and/or the cost was much lower than in the states. Personally, I would have done it if my insurance said no to paying for my gastric bypass last month. If you do some research on some of hte doctors, A LOT of them are of mexican descent, got their training in the states and just go back there to practice. Its smart for them really, because there are no "contractual adjustments" required like there are here in the US. (for example, someone getting gastric bypass and the insurance only pays $6000 and the doctor or facility has to write off the other $6-8,000).
As with any surgery, including WLS, you just gotta do research and be careful no matter what.......
Boricua, tell your wifey that I send my well wishes and GOOD LUCK