This is a hard review to write. Used as the product is designed to be used, I'm not sure it's great: When combined with my eye shadow as directed, it goes on my eyes unevenly leaving clumpy bits of make up stuck together and other patches watery and thin looking.
HOWEVER, it works great as an eye shadow primer. Put it on your eye lids first off, and let it dry. THEN apply your shadow, and it has great staying power. Plus it is paraben free and entirely natural.
I have been using Urban Decay as a primer, but it is full of parabens and I wanted a replacement. This works great and a tiny little bit goes a really long way - literally half a drop each time - it is expensive but will last ages.