We chose Dr. Nishimoto because she has lots of experience (she's been in the business since 1978) and because the United HealthCare site said she spoke Japanese, which is important for my wife. Unfortunately, she doesn't speak much Japanese, but we still like her. She's very personable and her recommendations sound honest. It may take a bit more time here than other offices, as she does everything herself (including reception), but it means that you get all the attention. The only knock here was that the injection of anesthesia was the most painful I've had. Despite this, however, I feel that she is competent and I would recommend her.
For billing, I have UHC and so far haven't had to pay anything beyond my normal insurance payments.