Unsatisfactory experience. Makes you wait for 45 minutes beyond your appt. time EVEN WHEN YOU ARE THE FIRST APPT. OF THE MORNING! He doesn't even bother to come in on time to make his first scheduled apptmnts! All of the work I've had done by Yoon has subsequently failed. Fillings have fallen out, the bridge he put in has disintegrated, and the root canal work underneath had to be re-done by another dentist. As a result of Yoon's work I am unable to chew food at all on one side of my mouth due to pain.