I have difficulty wearing eye liner; I find it smudges very easily. Liquid eyeliner is a challenge for me to apply; therefore I don't use it. However I found the Annabelle Smudge very easy to use whether applying a thin or thicker line. The only drawback was that I had to make sure I kept my eyes wide open until the eyeliner was completely dry; my eyes are deepset and eyeliner has a tendency to smudge on me.