What's your experience with the Clarisonic Mia 2??

Hey guys! I just brought the Clarisonic Mia 2. I've been eying for a while and caved in lol. Was wondering what's your personal experience with it? Is it worth the money? Does it clear up your skin? Is there any other brand that's comparable to the Clarisonic that you would rather buy instead?

Also Is anyone familiar with sephora's return policies relating to skin care products? Are they ok with customers returning an item that they used and didn't like? Because I know they're ok if you return a makeup item you used and didn't like.

Thanks!

Amy