This liner has really great potential, it's not super expensive for a liquid pen and is fantastically easy to use, but it just dries out so disastrously quickly! Within about two weeks of using this liner it had dried out to the point where it was practically unusable - to get any product out at all I had to apply so much pressure that I lost all precision... which is kind of the whole point of liquid pens!!
I also didn't find it to be a particularly rich black, which is definitely my preference.
Don't waste your time, spend the extra $12 and get the Stila Stay All Day.
I just recently got this liner and can already tell that its quickly becoming one of my favourites. My current fave liner is the Kat Von D tattoo liner which has a similar brush hair tip but isn't as precise. This liner has a short tip which is just brush hairs that come together into a super sharp point. Brush hair liners are my favourite because as you're drawing the line above your Lashes, they fan out to create a smooth line. There is no need to press a button, a thin black fluid comes out of the tip by itself. The tube is a thin, black tube which is typical of a liner such as this. The liquid itself is nice an black, making an opaque line without having to go over the same spot over and over. I love this liner, it allows me to get a super sharp line without too much mess. I can't comment on how long the liner lasts for as I have only had it a few weeks.
Tips: Map out both wings before starting to draw the line on top of your lashes to ensure even wings on both sides.