This product is expensive, but I decided to use it because I like the Clarisonic brush. I like the Opal more than the brush. I have only used it with the serum for two weeks and I notice a difference in my eyes. I also figured out that if you put the Opal by the bridge of your nose when you have a cold, it will make you sneeze and clear out your system. Buy the Opal and the applicator tips which will be $200 and use the $50 coupon and you will checkout for $150.