I got mine the other day, and only tried it once so far, but I love it! Well, i'm no make-up expert, and don't really use a lot of make-up, but i could definitely tell the difference from a normal sponge/other applicators! The result is really smooth and even, and it's really easy to use. And it's fun too, but that might just be me, hah..
I also tried it with my powder blush, on top of the foundation, and I really loved the result there! Way better than with a brush or anything I've tried before. It gives a really natural and even look. Worth the money, I'd say. Or, that depends a bit on how long it lasts...