def controls oil; I apply it just before powder foundation and have noticed a significant difference 

This is a great bargain. The powder is finely milled, which makes it transparent and virtually undetectable on the skin. Doesn't clog up my pores and doesn't cause any allergic reactions, whereas some powders do for me. The packaging is very compact, it doesn't take up all the space in my bag which I love. This is my 2 purchase of this product, and I'll definitely get another one when I run out. 

Idk how I feel about it fully, sometimes its really nice other times its drying and patchy