This is one of the three eyeshadow bases made by NYX (I have reviewed the other two separately). Personally, I don't feel that this product does as it claims to do. It's doesn't prevent creasing, doesn't make eyeshadows more vibrant, and doesn't make your eye makeup wear longer. It is very pretty, but you definetely need a primer underneath it. While it may not serve it's purpose as a base, it certainly does other things.
This "base" is a great way to add sparkle/shimmer to any of your matte eyeshadows. Beware, this product is quite "shimmery." No fallout, but it does glisten in the light. Because of this, I love to use it on my lazy days. Whenever i don't feel like really applying eye makeup, I throw a wash of this base from my lashline up to my browbone. It instantly opens your eyes, and makes you look more awake. Must say, I do love it.