I have been a a patient of Dr. Woo since I was 10. Now that I am 30 and still seeing him as well as my whole family. I had these fillings put in by Dr. Woo at 12 and they are still snuggly in placed. At age 14, I was forced to see another DDS due to insurance issues & got one fillings put in but that only lasted til I was 23 yrs old. Dr. Woo does quality work on all his patients. My aunt travels from Las Vegas just to see him.