I found Dr. Khang to be very cold and unfriendly. He hardly said anything to me, and when I tried to ask him a question, he cut me short! He gave me the most painful shots! When the dental hygenist put the numbing agent on my gum, he didn't wait but 3 seconds before he started to give me a series of shots in a very fast and rough manner! I since have switched doctor! His dental hygenist was very nice, though, so were the desk staff.