In my eyes, it was much better than Urban Decay. It's a skin-colored primer that doesn't feel oily like Urban Decay. (It just gives a transparent feel when applied.) Urban Decay often had the oil layer separated from the contents, but this one didn't have that issue. Even though it's a tube, the contents don't come out excessively, and it applies thinly and matte without the oiliness of Urban Decay, so the application feels clean. (It's comfortable to just dab a small amount on the back of your hand.) It creates a smooth base for applying eyeshadow, making eye makeup easier. The brush glides smoothly. My eyes are extremely prone to creasing and oil buildup, but the creasing and oil issues were significantly reduced. I'm very satisfied with this aspect.

The eyeshadow longevity isn't perfect since my eyes tend to smear a lot. But among the primers I've tried, this is the best one. I'm grateful that even when the eyeshadow moves a bit on my eyes, there's no creasing, and the oil doesn't come through.

The difference in eye makeup between the right and wrong days is stark! I've also tried Urban Decay, but personally, that had a creasing issue. The Too Faced one has no creasing and applies more thinly and adheres well. Using this, there's also much less smudging. On days when the color is really pretty but the pigmentation is lacking or the staying power is weak, I tend to use an eye primer.

It's probably about accessibility and price..ㅠㅠ Since it ends up costing over $20 including tax, I'm not sure if it's worth going through the trouble of direct purchase.. But I'd still recommend it to those who can afford it!ㅋㅋ

- If you apply it moderately to the under-eye bags and the triangle area, the eyeshadow, liner, and mascara don't smudge at all:) But that might be because my skin is dry..ㅎㅎ - And on days when I use a highly pigmented eyeshadow as a base, I don't apply the eye primer; the color payoff is just too intense ㄷㄷ - For those whose eye makeup stubbornly smudges no matter what, finishing with a powder is a must;)