I purchased this product at Target, which now carries the e.l.f. line. It was $1 in stores. The purpose of this product is to act as a base for eyeshadows and increase the time of wearability and decrease the, well, creasing. This product also makes shadows more vibrant and true to form. I have previously tried Urban Decay Primer Potion and the Too Faced Shadow Insurance. They are far too expensive to repurchase on my college budget. I was excited when I came across this product! I purchased it right away and ran over to my local Ulta and swatched them against the previously mentioned products. The effect is the same as UDPP and TFSS. And at a fraction of the cost. I would highly suggest it for those on a budget and those who are looking for a good primer for their eyeshadows.