I have been considering "ditching" my coach myself, so have been interested in reading all the responses. My weigh-in center is a satellite office for the main office which is located about 20 miles away...and is run by a chiropractor. Granted, the chiropractor knows more about the body than I do, but I don't consider him an internal medicine or weight loss specialist. So I think the "medically supervised" thing may be mainly a marketing ploy.
I see two different people when I weigh in, depending on who is there. As far as I can tell, their credential are they they have gone thru the program themselves. One only weighs, measures and sell products--doesn't even look at my food journal. The other one looks at my food journal, will give suggestions, weighs and measures me, but I spend 10-15 minutes tops with her and I feel like she is always rushing me out. Plus, she usually gets 3 or 4 text messages while I'm with her, and always attends to them. I've checked my scale and while it weighs me higher than their scale does, it's consistent. Every time their scale says I've dropped 2 lbs., my home scale says the same thing.
I'm not sure what I'm going to do, but I think I will make a decision one way or the other after the New Year. I'm not sure I need a coach and I think I can do it myself--with this forum for support, of course!