Dr. Cheng did my sliding tissue graphs, all quadrants. I had no problems during the surgery or during the healing process. She checked in with me over the weekend while I was recovering and made a very unpleasant procedure much easier to endure.It's been almost three years since I had the work done and my gums are doing great and still look healthy. I appreciate her expertise and gentle manner. She is not cheep but well worth the out of pocket expense. My motto is NEVER bargain shop with your health. She is worth every penny.