I've been going to see Docters Anna Yoon and Michael Tseng for about 6 years. Both are great people and excellent dentists. Dr. Yoon in particular has a very sensitive touch and I rarely feel any pain at all when I go to see her. I have used United Dental Group for regular check ups, cleanings, whitening, fillings, and cosmetic repair work with composite materials. About 4 years ago I went to Dr. Yoon to have my mercury fillings replaced with safer composite fillings (8 total). I'm so glad I did.