Zero is just a basic black, but the pigmentation is astounding. It can be smudged if you want that kind of smokey look, but then it just freezes in place and will not move. It won't budge, the entire day, even if you do have oily eyelids (I assure you). Their claims are actually completely true--you have a 30 second time frame to smudge if you please, and then it's not going anywhere. It doesn't come off unless you use makeup remover (though it comes off gently, no scrubbing required). It's so creamy and smooth and goes on like a dream.. Otherwise, I might be having an affair. I love the amount of control I have with this, although the creamy quality prevents you from getting a sharp point, so it's pretty impossible to get a fine line. Therefore, this is my smoky-nighttime eyeliner. Urban Decay 24/7 Pencils can be purchased for $19 (.04 oz) at Ulta, Sephora, or on Urban Decay's website.
Side note: The Grindhouse Pencil Sharpener that UD sells for $10 is a waste of money. If you're looking for a good sharpener that will sharpen creamy pencils like UD or NYX, get the Essence Dual Sharpener from Ulta for a fifth of the price (that's $2 for those of you that don't like math), that works exactly the same. In fact, they're made in the same factory! I bought one and it sharpens my UD pencil beautifully without wasting half the pencil with each sharpen like other sharpeners. It's actually made for creamy products (but works well with harder ones as well). And, it comes in more colors (mine is black with glitter). :)
What's your favorite eyeliner pencil?
Disclaimer: This product was purchased with my own money. I am in no way being compensated for this review (I wish I was, though!)