This stuff has to be the best six dollars that I have spent for my eyes.
JulieG713 had been using this in her tutorials lately so I picked it up (this was the same day I got the Jesse's Girl nail polish designed for Julie in JulieG, a bright coral). I wear this under my L'Oreal Color Fresco eye shadow sticks, Revlon cream to powder eyeshadow and my Revlon Vital Radiance Mouse eye shadows. Without this primer all of these products crease, even with a shadow over them.
Before you drop your 18 dollars on Urban Decay's Primer Potion, give this product a try. I find that you only need a small amount of this product for it to work. I store mine standing upright in a cup with my eyeliners and shadow sticks. I do find that some of the product globs in the opening and gets all over the wand and around the opening of the container. Because of this, I have to give this 4 out of 5 stars.