A good eyeliner for me is all about staying put all day and keeping its vibrant color without smudging OFC.
And also i hate touch-ups, i love long-lasting makeup..when i 1st tried MUFE eyeliner pencil, i didn't expect much as i am used to getting letdown by eyeliner since i live in a very humid weather that made me believe i will always have raccoon eyes ;(
So I put my MUFE aqua eyes and after a long day approximately 8 hours out with friends in a very hot day..I look in the mirror and KABOOM,
-my eyeliner looks great, still Vibrant with no change in color.
-It didn't smudge.
-It just faded a little bit at the end of the day(but that is absolutely not a Con, after a very long day in such humid weather & with an oily skin like mine with absolutely no touch-ups).
I absolutely love it, finally i found my HG eye pencil, sure will get more colors(i have 22L which is a lovely grey that isn't blackish nor silver)
But i recommend you to try it first, because what worked for me isn't necessarily going to work with everyone :-)