I love when ULTA has their 21 Days of Beauty...I've been trying to watch my budget lately so I didn't indulge myself too much. However, when they had Clarisonic brush heads for buy one get one free...well I could not pass that up. (Total $27 for two!)
My Clarisonic Mia was probably one of my best purchases when I was a Macy's (employee discount woot woot). It's been a few years now and I still love it. Plug in to charge it every once in a while and change out the brush head every few months. Done. I've never tried the other brushes on the market because I've never needed to.
You can use any type of cleanser you'd like with this brush, lately I've been using it with Murad's Essential-C Cleanser and Dermalogica's Daily Microfoliant. Exfoliating with the brush is really nice, it leaves your skin so soft and smooth. Bonus being that when you give your skin a nice exfoliation your follow up (serums and moisturizers) will go on more smoothly and penetrate deeper into your skin.
What has been your best beauty purchase?