i love dr. shang. some people say she is too harsh and rough, but i personally like it bc i feel like she really gets in there and does a very thorough cleaning. i think she's pretty expensive though...a routine cleaning costs $170, which if you dont have insurance (which i didnt)...seems like an awful lot. but her office is very clean and you dont leave feeling dirtier than when you came in, like many offices in new york.