I'm pretty sure this is the best eyeliner in existence that won't leave you explaining to the bank that you really NEED the second mortgage, because have you seen the prices of eyeliner lately!
Anyway, I first bought this because I was eager to try the twisty kind of eyeliner that doesn't involve sharpening, and because the one I was wearing at the time wasn't working out. My skin isn't very greasy, but my eyelids are super greasy. My beautiful, creamy black eyeliner usually migrates entirely to my crease by about ten minutes after I leave the house. I wear quite a bit of black eyeliner, so I'm guessing you can imagine my problems. This, however, is different. This stuff put up with a lot of crap from me, example, a long day at school, then shopping for an hour, before an intense evening of dancing. Without smudging AT ALL!
The second awesome factor is the price. I can't find exactly how much it costs on the site, but I think that I paid around six dollars for it at my local super market. Some people might say that this price is a sign of poor quality, but unless it's radioactive, of something, I'm pretty sure this stuff is amazing.
The one possible downside to this product is that it doesn't wear well with eyeshadow. Try as I might, I have yet to make it appear black on top of any kind of shadow, be it matte or shimmery.
Over all, I think that I would give this product a 5/5.
(Picture from Covergirl.com, the picture is a link to the product page. )
(I am not being paid to sell this product, I just really like it.)