We love Dr. Louie! My whole family (and that of many of my friends) have been going to him for years now. He is patient and thorough and goes out of the way to make sure my young kids feel comfortable with him (my 3 year-old now loves going to the dentist). Even my relatives from the Central Valley make the long drive out to San Francisco to see him.
His office staff is great--there's always a friendly voice on the phone, and we've never had to wait long before our appointments.