Since this is a general review on NARS eyeshadows overall, I'll try to be as detailed as possible:
At $32 for a duo, and $22 for a single, these are the most expensive eyeshadows I have ever purchased. I don't think that overall the quality of these is better than MAC or Urban Decay, however, NARS offers some of the most vivid, unique, and highly pigmented shades I have ever seen and this is why I continue to buy them.
The texture of these is quite variable. I have the purchasing pattern of sticking my finger in the tester before I buy it... some of these can be quite chalky and others are unbelievably velvety. The velvety-textured shades will apply the same shade as in the pan with the tiniest amount of product, while the chalkier shades go on more sheer but are often buildable.<P>I'm not as fond of the packaging as everyone else is. I generally don't have problems with dropping makeup and having it destroyed, so maybe that's part of my lack of appreciation of the black rubber case. The quality of it is quite good, and it's nice that it's got a full real mirror - Urban Decay seriously needs to work on that with their palletes and stop putting shiny silver stickers in there. I digress. While the packaging is of high quality, every NARS eyeshadow and blush I own looks exactly alike when lined up together. The only difference is the shade name printed on the bottom. I really like the way UD eyeshadows have the name printed (more boldly) on the bottom, a sticker with the approximate color of the shadow on the bottom, and the clear window on the top. The bottom of Clinique shadows similarly have the shade name printed but with a color-coded pan that very closely approximates the color of the shadow. I just really hate the idea of not being able to tell my Rated R eyeshadow from my Desire blush without having to look closely.
For me, the big advantage to buying a NARS eyeshadow is the uniqueness of the color. I don't buy the neutral shades since I can get plenty of less expensive neutrals in less mysterious packaging from other brands. The thing that completely baffles me, however, is how on earth the shades in the duos were put together. I love the duo colors separately, however, they seem to be the two shades least suited to each other and are impossible to wear together. Again, it doesn't matter so long as I like both of the shades, but something I've seen a lot of complaints about is the purchase of a duo in which only one shade is nice and then you're left with a shade that's useless because it doesn't suit you and can't be paired with a nice shade.
My overall take: If you're willing to spend the money and you love the color, NARS will not disappoint! If you're inexperienced with makeup and you buy duos/trios/quads/quints because the colors are supposed to be nicely paired to be worn together, NARS will make you crazy. Buy something else.