I've done some reading up on it myself. Looks like they do it somewhat commonly in Korea and with stable, aesthetic results. I just googled surgery first jaw surgery and several articles and reviews came up. A guy on real self had it done for about 10k in Korea. His results look pretty good. Also, I think if you have a good occullusion and they move both jaws forward equally, than your bite should remain the same, in theory. I would need some tweaking to make my bite fit and I'd also like a downgraft for more tooth show or CW rotation, if that's what that does.