Dr. Margaret Sommerville is amazing. She explains everything in great detail. She is careful and takes her time. After the first treatment, a lot of my sun spots were gone and my skin felt smoother and fresh. Her skin care recommendations were great. I especially loved the tinted moisturizer with SPF 45 that she gave me completely free as a promotion! The serum that she recommended is applied under the tinted moisturizer and it literally fills in fine lines making me look younger. Dr. Sommerville believes in using Retin A and the way she explains how to use it in order to avoid irritation definitely works. I also want to add that Dr. Sommerville is caring and approachable. The staff at Chevy Chase Dermatology is great too. From the welcome letter to giving out samples and avoiding any kind of pressure to sell, the experience has been top notch. I am looking forward to more treatments.