I tried this a few years ago and, honestly, I was not a fan! I found it was juts too light and looked odd on my skin. But, I have come back to it recently with an improved make up routine and have found it's great as a translucent setting powder.
It's great for maintaining the matte look that I like and it's so light it just sits on your skin nicely without emphasising your pores.
I apply it lightly with a big powder brush over top of my liquid foundation and concealer. It just helps set everything and make my make up last all day while taking some of the shine from my face. It's a great, cheap, drugstore powder!