Generally I'm not a big fan of powders, especially loose ones, but I really love this. It doesn't have that dense, heavy sensation on my skin, and it looks beautiful. It's gossamer fine, very lightweight, silky, and leaves a lovely finish. When I ordered it I was expecting a slight sheen or something light reflective as the name implies but it's more of a satin finish. Not flat or powdery looking at all, and it doesn't make my skin look dry or lifeless. It never looks like I'm sporting a powdered face.
I've been using Chanel's loose powder for a few years now, and while I love that one, it sometimes adds color to my skin. Being so pale, even Chanel's lightest shade can darken my skin somewhat. Comparing the two, the NARS is finer and less dense. It clings lightly to my brush and that helps add the perfect light, imperceptible layer to my face. Also, it doesn't cake at all, so despite a liberal dusting it never clings to certain areas or turns cakey. It sets my liquid foundation nicely, adds a lovely polished effect, and I can still maintain the effect of my own natural skin.
This looks truly translucent and colorless to me. I don't notice a white cast or a lightening effect at all. My skin is NW10, normal, sometimes slightly dry in small areas, and I avoid heavy products and thick powders at all cost. This worked perfectly for me in every possible way and I've been using it exclusively since I got it... my Chanel powder is being put aside for the time being.
Other bonuses: no scent, doesn't irritate my super sensitive skin, and a little goes a very long way. I don't think loose powder are great for traveling but I just put a tiny piece of tape across the dispenser holes when I travel. Weird but that blue painter's tape works well for that and doesn't leave a sticky tape residue behind when removed.