I like this eyeliner a lot. I completely agree with the previous reviewer below me, her review is 110% the way I feel about this eyeliner. This is a very deep black eyeliner, one line on my waterline deff does the trick. I love how intense the color is, it would look great for a smokey eye look. This does only last about 3 hours tops without smudging, but I have yet to find a pencil eyeliner that could do better. This is really expensive, it's $19....Urban Decay should do something about that. I don't quite feel this is worth $19, if this was truly "waterproof" & actually lasted "24/7" then it would be worth $19. I also have urban decay's eyeliner in zero. Zero is good too, but this one is better if you want a blacker, more intense look faster. Zero can achieve the same look as perversion, but you would have to apply a lot more of it.
**UPDATE:** This eyeliner is terrible for the waterline, this smudges like crazy. Zero works way better for your waterline. Yes, Perversion is blacker & more intense than Zero, but Zero actually stays in place without smudging for the most part. I will stick with Zero for my waterline. I will not be buying this again.