Dr Ralph Hoffman and his entire staff are super pleasant, effective, and honest. I highly recommend them to anyone in San Francisco.
The office is in the Sunset, so it's easy to find a parking spot and they'll feed the meter if you're there for more than 1 hour (bring some change :-)
Dr Hoffman has given me 3 crowns. My front top tooth looks perfect. My molar crown has been in for over a year without trouble. The newest crown just went in. So far, so good.
Dr. Hoffman's hygienists clean my teeth flawlessly and encourage me to brush ... and floss!
See for yourself - they're great!