Dr. Branch has been a part of the Seattle dental community for decades and seems well-respected. He is willing to explain his decisions at length if you want to understand them thoroughly. He has a straightforward personality that might rub some more emotionally sensitive folks the wrong way but personally I appreciate the directness.
Two of his staff (the receptionist and principal assistant) have been with him for I believe around twenty years, making a really solid team. I have been seeing Dr. Branch for only a year or so but the treatment so far has been excellent.