I use this on my face, and I cannot say I find it appreciably less greasy than other sunscreens. Then again, I tend to have very oily skin - especially in the summer - and would love a mattifying sunscreen if such a thing existed. I do appreciate that it is a physical sunblock instead of chemical, though.
It dries pretty sheer, but be aware that if you perspire, it will show white, even hours after application. I can apply this at noon and then go biking in the late afternoon and any sweat is cloudy instead of clear (making it much more visible and odd-looking) and bits of white show on the skin. I realize most people won't be heavily perspiring in this during their daily activities, but just an FYI.