good pigmentation, may rub off easily
Actually, this is the first and only pen eyeliner I have used (after looking at some reviews). In contrast to other pen liners, this one does not have a felt tip, but more a brush like tip! It applies very easily, and gives a nice deep black color. However, when I use my eyelash curler after I apply the eyeliner, it does rub some of it off. As a result I prefer to use this with my heated eyelash curler. I purchased this for about €10-11 (shipping included), so I don't think that's a bad price for what I got.
I've repurchased this eyeliner once and while I think it's decent, honestly, there are other brands that make a very similar eyeliner that are not as expensive. It's easy to control because of the tip and because it's a pen, but it's not as black as I like my liquid eyeliner and does not stay on for a very long time. It's cute but average.