The Clarisonic is a skincare brush that deep cleans your skin, removes makeup better than other products, and reduces the appearance of pores. The Clarisonic Mia does the same job but is slightly different. It's considered the travel version so it's smaller, cheaper, comes with a different charger, etc.
After using it for awhile, I can confidently say that I'm in love with this thing!
I have had great results. My pores appear smaller, my skin feels smoother and my makeup applies better. My skin was oily in the t-zone with dry areas on my cheeks; now my skin is much more balanced - no excessive dry or oily patches!
I use my Clarisonic Mia 3-4 times a week (at night) with a basic cleanser and I love how fresh and and clean it makes my skin feel before bed. I used to be one of those people that couldn't be bothered with washing their face at night and now I can't imagine not doing it. This is definitely an investment at $119, but over time you will see a major difference in your skin.
You can find more info here Clarisonic Mia(TM) Skin Cleansing System
Disclaimer: This is not a paid or sponsored review. No affiliate links were used in this post.