Amazing coverage, blends really well. Only thing is that it is a little small for the pricing. 

You don't have to apply a lot because it has a good amount of pigment. Maybe my dark circles are a little too dark but I dont feel it covers them very good .. But it covers redness good for example my redness around my eyes!

Pretty good coverage for me, sometimes I use this alone without any foundation. It can spread pretty far and thin with a lightweight feeling. I find that if I use this with some of my medium to full coverage foundations, my face ends up looking cakey! So I only use this with light to medium foundations or alone. I have the COSRX Clear Fit Blemish Cushion in the matching shade and the shade match is the same. Unfortunately, I find that they actually don't work that well together. However, the cushion is high coverage already so I don't see a use in using the concealer. I actually prefer the concealer over the cushion, since I find the cushion looks quite thick on my face while the concealer is much more thin and light.