This product does exactly what it says it does- cuts down on sebum!  The powder is very light and pretty much goes on translucent, I'll use it as a final step after cleansing if I'm going makeup free, and sometimes put it on over my makeup if I think I'll get oily.  It does a really good job, especially on a makeup free face.

The one thing I don't like about it, (which is not enough for me to take a star away) is that I haaate the cushion that comes with it.  It makes it difficult to apply evenly and will pick up makeup in a heartbeat if you use it to finish up and sometimes will make little blotches of powder try to smear across your face.  I just use a different brush and build up the product on that instead, and it is great!