Agreed about the diplomas. I went to a HT doctor for a large part due to qualifications- ISHRS, IBHRS, EHRS, part of DCD & TDD associations. Means nothing when you have techs doing the work. Ultimately they over harvested (having been told by several doctors subsequently), graft placement all over the place, doubles and triples on the hairline and not much growth. You can't do enough research, I thought I had done enough. I thought I had a good doctor, see's one patient a day, good reviews, he was sponsored on another forum etc. I was naive, they screwed up my transplant and not left me with much donor left.
Unless you see multiple good user reviews with clear shots don't consider them.
It's a minefield out there. I know there are doctors who make you sign a contract before your transplant so that you can't speak about them negatively on any social media/forums.