I hear nothing but great things from the Kevyn Aucoin brand. I don't own too many products from the line but was intrigued when I swatched the eyeshadow duos at my local Space NK. They felt extremely soft and buttery. I of course left with one. The Kevyn Aucoin Eyeshadow Duo 206 contains the shades Taupe Shimmer and Blue Black Shimmer.
Taupe shimmer is more of a silver satin/shimmer shade, with a hint of taupe. Blue black shimmer is a deep blue but not too black as the name implies. They are both super pigmented and easily glide on the lids. There is minimal fallout and the looks created with this duo can be quite subtle. I would say the quality is close to the buttery texture of Burberry eyeshadows. I did get a little sticker shock from the $42 price considering Nars duos are $34 and Estee Lauder duos are $32, each of which I think are pretty close in quality.