Great clear primer for eyeshadow, works on my fairly oily lids. Works well as base for filling in eyebrows too (I use MAC Coquette e/s). I find it less drying then Urban Decay Potion, and prefer the light texture as well as velvet-soft finish--looks and feels like skin, shadows blend more easily, no creasing w/ powder or cream formulas. A must have for me.
Packaging is typical NARS, relatively practical. Pricey, but worth it.