My skin is combination skin, and in the spring/summer, especially, the T-zone on my face is perpetually oily and shiny.  No type of makeup or powder helps with this problem.  Since the other parts of my skin are dry, I use this product only on my T-zone, and have noticed, after just a few uses, a definite improvement in shine, oil, and what I call "makeup override" which is when oil overpowers and makes the makeup on my face disappear in those oily areas.  My nose/forehead still gets oily looking later in the day, but this is a big improvement overall.