I'f I could i'd give this a 3.5, not a full 4. This stuff works fairly well. It keeps the oil away for a few hours, but doesn't last all day/night. It's a little weird though. I noticed if I use it with different types of foundations, it gives different results. With my Clinique Superbalanced, it didn't work well under my foundation, but worked well on top. On the other hand, it works really well under my Boots No. 7 Firming & Lifting foundation. Under my Pur Minerals powder, it makes my pores look bigger. But I guess overall, it does what it's supposed to do. It feels very nice and smoothing and hasn't broken me out. The bottle is teeny tiny, but i've been using it for 4 months and I still have a decent amount left. It is expensive, but I got it off Amazon at a cheaper price. Idk if i'd buy it for full price though. I don't love it, so i'll probably try out other mattifiers to see how they compare.