My skin is as combination-ey as it gets. I have naturally oily skin, which sometimes causes cystic acne. If you've ever had cystic acne, you know how notoriously hard it is to cover up. This is especially true if you use topical medication or drying agents like retinoid creams or gels, or oral medications that make your skin dry. So what you're left with is a flaky, sometimes oily, patchy mess. I exfoliate my face in the mornings to try to ameliorate this effect, but sometimes I still have tiny, flaky bits of skin that show up once my face is dry.
That's why this product is so great-- the concealer is in the center, and there is a moisturizing outer ring which helps the concealer blend flawlessly into your skin without mattifying it so much that it's obvious you're wearing makeup, and without leaving behind a greasy glop of shiny mess. I don't know how they do it, but it's like magic. I follow up with Cargo pressed powder, and it's like nothing even happened.
I haven't met a better concealer for combination skin.