Love the Clarisonic Opal! I wish people would rave about this as much as they do the Clarisonic brush. This bad boy delivers the equivalent of 1000 taps per second using finger application. I don't like the serum so I just use my own eye cream. I apply a bit of cream under my eye then massage it in with the Opal. It definitely helps the product absorb quickly and makes a big difference in puffiness and dark circles. Love it!