I love the Nars Concealer. It is so blendable and it hides all the red areas and blemishes on my skin, though I do not use it for under eye circles because I don't have any.
The the person before me said, you have to warm it up first. I got the duo Concealer and ran my finger around it until it was more creamy then placed it unto the skin. After doing that, my concealer has not been dry. It also stays put all day on the Oily face.
For referance, I am NW25 and I use the Vanilla/Honey, but mostly the honey side. These 2 concealers are more cool toned. Ginger/Custard and more warm tone so they would suit the NC people.