I've been using this new mascara every day since I got it and I'm a bit on the fence. I'm not a huge MAC mascara fan, but I really wanted to like this one!
The good news...this doesn't clump on me at all, and I haven't experienced any smudging or drying out/flaking off. I get good separation of my lashes and it's quite buildable without getting goopy and gross. Also, I love the brush! It's not as chubby as the Lash Blast brush, and the bristles/spikes are more spread out.
The not so good news...If you want serious drama, this isn't the product for you. It does layer well with other mascaras, but alone I could see this being quite average for most. It takes quite a few coats (and time I don't have in a hurry) to achieve a look I'm really happy with.
One more thing! With a little effort, this mascara is just right for the whole "no make-up" make-up look I'm so into right now. If you're curious, I'd say this is worth a test drive, but try it before you buy it!