The stamp side works great, the nylon tip, not so much.
I use this eye liner almost daily.  It dries quickly and lasts all day! The unfortunate thing is that I can only use the stamp side.  The brush tip leaks and spills product everywhere and is difficult to control without making a mess.  I basically have to just use this for the stamp and use a different eyeliner completely for the rest of my eyeliner.
Rating: 3 stars