I have a couple of these in various shades. Mainly because my favourite shade was discontinued so I had to buy a few to find a comparable colour. I use this as a blush - it gives a nice shimmer and is easy to use.
Can't say I've noticed any effects on my skin due to the vitamin e, or any anti oxidant effects but the product is great regardless.
I just smudge the stick on where I want it and blend with fingers or a brush. If I have done a full, heavy foundation I did find when applying it can wipe away the foundation rather than sit on top - especially if the stick is cold (I sometimes stick it in my pocket or a warmer room for a while before using if it's super cold).
I love that the shimmer is shimmer - not glitter. I hate those tiny dots of glitter that are in some shimmery products - they just aren't for me.
I will and have repurchased this item and look forward to adding more to my collection.
I have the copacobana shade which is a champagne-ish colour perfect for highlighting. I use it under or I too of my foundation and it builds and blends beautifully. I usually just wipe it on straight from the stick and blend it out although I don't think this would work for a darker or brighter shade. The packaging is awesome, beautiful and sleek like the other products from nars.
Tips: Blend well for a beautiful even colour :)