The Sonic Skin Cleansing System uses a patented sonic frequency of more than 300 movements per second to clean, soften and smooth skin. In just 60 seconds, the brush gently, yet thoroughly removes 6X more makeup and 2X more dirt and oil than manual cleansing alone. There are several models to choose from. The difference between them is colors, size, speeds, and time. The latest has a brush that can be used on the body as well. All models are easy to use. I have had mine for over a year and I am still in love with it. It has become a part of my daily routine. It makes my face feel amazingly soft, smooth, and super clean. My complexion is more even and clear looking. Yet is so gentle on your skin that it won't leave red or irritated so that even people with sensitive skin can still use it. The biggest and only con I found for the The Clarisonic Cleaner was the price. It cost me about $200 which for most people is pretty steep. However, after numerous reviews I finally caved in and bought one. Thank goodness I did because I am 35 years old and my skin has never felt and looked this good since I was in my teens.