I totally see Chicago's point--I live in SB, so Dr. Gunson was a no-brainer for me; it would be pretty miserable to travel all those miles if you didn't have to (and with LA traffic, who knows how long it'll take--ugh).
However, I also highly recommend them. Dr. Gunson and his staff have been great--taken as much time with me as I needed, answered all my questions, given me clear and high-level information, etc. I've had lots of dental work done over the years, and they've been, by leaps and bounds, the most professional and communicative about my procedures. Some doctors talk to you like a child, or a lesser kind of being. But at Dr. Gunson's office, I've always been treated as an adult, very respectfully. Also the staff at Cottage Hospital (where the surgeries are done) are awesome.
I did have a fairly invasive surgery: double jaw, 18 mm. advancement of lower jaw and 5 mm. of upper; lots of bone grafting. In my case I think this was totally warranted. I'm still fairly swollen and don't have a clear idea of what my results will be, but so far I'm pleased: the aesthetic problem I always had with my face is solved, and I still look like myself. They work with your features, so while the effects are powerful, they're also subtle.
Anyway, I seem to be going on and on. Feel free to PM me if you have questions.