i tried quite a lot of concealer product before because I have acne, redness and dark circle problems.
skin type: combination to dry
CDP: it is good when I was young, but I am feeling too dry for now if I use it for my dark circle. For ance and redness areas are acceptable
Cilo: the price is really cheap on Gmarket. I have got their concealer pencil and liquid. Pencil is very convenient for little spot and build up coverage. I love it.
Liquid is a bit dry to me but the coverage is very nice. I will recommend it for oily or normal skin.
Bobbi Brown: too dry for me =(
P.S. Recently, I am using Etude House concealer cushion (green color) for my redness. It is very good, not dry. It can cover 80% redness and then the coverage is good enough for me after I apply foundation. Maybe we should fine tune our color tone before adding any concealer.