NYX felt tip eyeliner is the eyeliner which is easy to draw as pencil but having a liquid eyeliner effect. It is like an ink pen. I have used 2 colors from them, jet black and black, jet black is more like dark blue color.
Good points are inexpensive, nice packaging, good eyeliner quality, easy to draw, good for people who wants to start to use liquid eyeliner
Weak points are easy to dry up, if you use it everyday, you are likely to buy a new one in the end of the month,but I can say it is ok as eye products are better if you use for short term and change a new one.
I like it and keep purchasing it.
Have you tried NYX felt tip pen? What do you think of it?