I have combination skin and this didn't do it for me. I love the Smashbox brand but this doesn't deliver much in the way of moisture and I'll be sticking with separate moisturizer and primer that both perform well.
I have combo skin that leans towards dry and I use it after my moisturizer and I love it!! It's the perfect amount of moisture that won't send you into an oil slick. I feel like it helps keeping me from getting too oily :)