To call Urban Decay's Eyeshadow Primer Potion legendary is not an exaggeration. In fact, there are thousands of reviews by pros and amateurs that say the same thing.
As with most primers, this makes your eyeshadow more vibrant (which is good if you're stuck with something that has poor color payoff).
When applying this product, I like using my ring finger instead of the applicator because I feel that's the best way to spread it evenly. I've read complaints that its difficult to blend - it is if you put too much primer. A thin, even coat will make it easier to blend your eyeshadow.
While other primers feel slippery and just glide on, UDPP feels a bit heavier. The texture is tacky and putting on too much leaves the lids feeling heavy and sticky. Trust me, I had to deal with this when I first applied the product. Just a little works fine. In fact, there's a lot of product in this little bottle given that the shelf life is only 6 months.
I've tried different primers and this one does stay on longest. Unlike others that would keep my eyeshadow on for about 4 to 5 hours, UDPP lasts at least eight hours. Don't expect it to last forever if you're out from morning to night, that's too much to ask especially if you have super oily eyelids. Still, this is the best out there and definitely a must in your traincase!