I really like Dr. Bui. I searched for a long time for a dentist in DC who I felt comfortable with, and I'm relieved that I finally found him. He has done 2 fairly large composite fillings in molars for me, and both of them were perfect. The cost was in the $200-$250 range for a filling. He also evaluated a third tooth which is causing me discomfort and told me I need a root canal. It is a molar with issues, and even though he does root canals, he was honest enough to say that I should have it done by an endodontist. He did a cleaning as well, and it was one of the best cleanings I've ever had. He works alone, and does everything himself. I like this fact, as I have been in several dental offices that seemed bloated with staff. He is a holistic-oriented dentist, which is the main reason I chose him. His office is not "spa-like" - but I found it to be very comfortable and serene. Another great thing about Dr Bui is he will answer any and all of your questions, and he will return your calls even if you are not yet a patient. And his receptionist Nancy is super nice. The only negative I can think of is, he does not have digital x-rays.
About Hygienist: There is no hygienist, as Dr Bui does cleanings himself. He first used an ultrasonic tool, then a hand tool, then floss, then polish. My mouth felt great afterwards. His receptionist Nancy is great.