An outstanding dentist. He always explains what what needs to be done and why, gives alternatives, and explains possible problems. He is truly painless. Before I started to go to him I was terrified of dental work; now I go in without a qualm. On my first visit he fixed an articulation problem which several dentists had failed to remedy. He did my front crowns so now I'm not reluctant to smile (that is not a joke, before his work I kept my mouth shut at all times). I have recommended Dr. Au to several co-workers, who have all expressed their delight in finding a dentist they can trust. I gave him a "3" in cost, but since I have very good insurance, that's just a guess.