Just received this concealer today, and I'm a little conflicted about it even though I had been waiting for quite a while.

I'd say that the different colours (yellow, blue, green and pink) do cancel out the colours they are supposed to, but I feel like something about the formula isn't quite right. It's almost too greasy or something, it doesn't blend in how I expected it to and it leave whitish or light spots all over your face. Better if used on the bottom rather than over foundation.

I will try it again and update if necessary!