I have mixed feelings about Dr Jang's office. The staff is nice and seemingly knowledgeable but a bit too rushed and eager to make money. Such is the impression that I got. One of the dentists drilled a hole in one of my child's molars to place an unnecessary filling. There was no cavity -- only a natural concave shape that she said might turn into cavity. My son has never had a cavity in his whole life. Subsequent dentists were amazed that this was done. In my experience, customer service is non-existent. I have sent multiple letters requesting dental records and there was never a reply.