Review (4/5): Great!!
At first it was a little strange but after I got used to it, this is the only eyeliner I use now. I used to use Marc Jacob's non smudge jet black pencil eyeliner which was the best quality, the color was carbon black and never smudged. But the only bad side about it was it irritated my eyes sometimes and if I accidentally sleep with it, I surely get a little bump on my water line on the next day. I slept with this eyeliner on for a several times and I haven't had any issues like that. Plus, this stays on for a long time and never smudges but very easy to remove with lukewarm water. The only downside of this product is that it is a little shiny opposed to matt finish and if you draw a thick eyeline like me, you need to be extra careful not to make a brush stroke. Other than that I really love this eyeliner :)