I usually purchase eyeliner pencils for 99 cents that work soooo much better than this eyeliner. I have to apply too much pressure to get the dark (even) line i like and i have to keep wiping it off and trying again. I am sending it back today.
I have been using this same product for 2+ years. It works perfectly! I think the other comments that were made, they possibly had bought an old one that could have been dried out? With this pen, you can make your liner as thick or thin as you would like! It wipes off easy while still wet if there's a mess up, but also dries quick. It lasts all day and for several months. I use it daily and replace it ~3 times a year.
I love this liner, I use it daily and find that the pigmentation is incredible, it only takes a light touch to apply, and the felt tip is perfect for tightlining. This liner has the same quality as other products in the colorstay line.