i've repurchased real deal concealer several times. haven't found better all-day coverage for my dark under eye circles anywhere, which says a lot since i'm a beauty product junkie! it offers fantastic coverage and smooth blending.
my only two gripes are that the medium deep shade is kinda dark for me in the winter (so i can only use it around my eyes unless i have a tan), but medium is WAY too light on my olive skin any time of year. also, this concealer definitely settles into the lines under my eyes throughout the day -- i combat that by patting eye cream on before & after applying, as well as mid day to refresh. to be fair, i have dry skin, VERY dry in cold weather, you may not have the same issue with cakiness if your skin is normal/combo/oily..."