I like this product. I don't really love it because its a pain to sharpen it. Sometimes the middle would fall out or the pencil wouldn't sharpen correctly and the wood scratches my eye. Sharpening it also takes a lot of the product out. I do like the feel of the color and it looks nice but its not the worth the pain and not really worth the money.

I really like this for a long time, smooth and soft, don't tug on the lid. However, the color's not quite black enough. Recently, I found Milani Liquif'eye, which is blacker and much cheaper. I don't think I'll go back to UD Zero

I have a couple sticks of this just because they often come with urban decay palettes, but I quite like it. It doesn't smudge and it stays on all day. Although if you plan to use it on your waterline you may have to reapply throughout the day depending on houw watery your eyes get. All around my favorite eyeliner.

Love, love love zero by urban decay! This eyeliner is very easy to apply and does not tug at all! The downsides would be the price and that it smears alot :/

I think his eyeliner is amazing. Glides on easily, has great staying power and is a proper black. Highly recommended.

This is my go to eyeliner in Zero. I adore it. I spent years looking for a decent eyeliner that wouldn't smudge or rub off during the day, finally I found it and I have no intentions of trying anything else. I travel all the way to the next city to get this (I live in England where literally only one store chain stocks it) that's how much I love this stuff.
It does exactly what it says on the tin, it goes on easy, stays all day and goes on blacker than black (and trust me, I spent many years in the goth scene, I have tried many, many eyeliners out for their pigmentation and nothing I've ever used comes close to as good as this stuff). I wear it every single day and I wear it quite thick, a pencil lasts me about 2 months or so, now I won't use anything else :)

Edit: They have now started selling perversion in England, which is blacker, softer and generally nicer, perversion is now my go to shade, but I still won't use any other brand!

those liners are incredible.. I guess the only negative thing they have is that they are a bit too soft !

As a gal with really oily lids, these are a HG product for me. They have tons of pigmentation, lots of color choices, and they don't budge! Caveat is that I do need some sort of primer, but I always use that before any eye makeup. I especially love their bold colors. Really bright on the skin!

I had always wanted to try the 24/7 eyeliner (zero), and I received a half sized sample through a swap to try it out. I don't quite understand why it's such a big deal because I have used drugstore eyeliners that work SO much better for me.

I am asian, so I always tightline and fill in my upper waterline, and don't line the tops of my lashes too often. It smudged within 30 minutes! I'm glad I got this through a swap and didn't spend the money on it. If you are into tightlining, Milani Liquif-eye and make up forever aqua liner lasts great and doesn't smudge on me.

I FINALLY found a pencil liner that doesn't smudge on me! I have tried way too many pencil liners that have failed on me, yet I still continuously buy new ones with the hopes of finding "the one". I got my sister the Naked palette during Christmas 2010 and it came with a duo-ended 24/7 liner. Since she is not a fan of rich creamy liners, she gave it to me to try. I was so surprised at how well it stayed on my eyes!! All creamy pencil liners like these would smudge, fade, and/or crease within an hour's wear. This baby wore beautifully for 10+ hours. I wouldn't say this liner doesn't do any of these nasty things--it does fade and crease a little but I've learned to accept the fact that my eyelids are just difficult to work with. All eyeliners will eventually crease on me due to my hooded eyelids. But this liner only starts creasing at the 8 hour mark. Even after 12 hours this liner still looks great from far away, I only notice the slight creasing if I look really closely in the mirror. Overall, amazing liner, definitely the best that I've tried. It's creamy, pigmented, long-lasting.

PROS:
- Long wearing --> doesn't fade, crease, or smudge until 8 hours later. But still looks decent after that.
- Does not transfer/smudge to the lower lash line (MAJOR plus for me!)
- Incredibly creamy and pigmented
- Easy to blend and smudge out when first applied

CONS:
- I'm not a fan of liners that I have to sharpen--this liner gets used up pretty quick, I have to sharpen it after every other use
- It's pricey for the number of uses I get out of it. If I pay a few dollars more, I can get a liquid liner that can last me a whole year.

In conclusion, I love this black liner. Definitely going to repurchase:) continued >>