Dr. Chagnoit is a wonderful dentist. He was recommended to me by two fellow employees when I first moved to San Francisco, CA to work for a high tech company. They had been seeing him for several years . I have never once considered another dentist. I have recommended him to family members and friends. He runs a small office, and as far as I am aware, he does all the work (dentist, hygienist, billing). I have never had a problem with my insurance -- he has always taken care of that. He is an interesting person and we chat during the procedure. He has gotten to know me and my family and I have gotten to know him and his family (informally of course). He always knows what he is doing and has taken great care of my teeth. He has filled at least one cavity and in conjunction with an oral surgeon he recommended, he has done a root canal and put a crown on one of my teeth. Of course teeth cleaning is at least a bit of a painful process for many. I have never felt more than mild discomfort during a cleaning. He does a fine job of cleaning my teeth. The only thing that I don't like about going to see him is the polishing at the end. He does it the same way every other dentist does it, so it is me, not him. 5 Stars all around/