Bruce,
I am glad that you are content with what was offered to you by him, but just because you are not fluent in Chinese, doesn't mean you can't seek alternatives elsewhere for a much lower rate for the same kind of work. Even if I did encounter a dentist that couldn't speak English, I have a friend of mine who can translate everything perfectly to me.
And just to add something that I forgot to say. I think Dany is a great guy, patient, and so on, but to be honest, if he is not the one doing the actual work, then in my experience, the work was just average. He also was supervising a filling that I had done, but without him doing the actual work, all you are getting from there is "someone who can speak English" with you.
Each to his own I guess.