I started using the L'Oreal Infallible black eyeliner June 2013 with the hopes that it would help me become an expert at the "cat eye" just like all the YouTube ladies. Well, six years later, not an expert; not even close. However, I still do use the eyeliner. The fine tip is perfect for us non-professionals, less chance for mistakes.
The first time I used the eyeliner it started to smudged. Nice look while at work...LOL. After several tries, the liner will last longer if you set it with black eye shadow.
The formula is smooth and very black. Dries pretty quick to a semi-matte finish.
Overall, it's a pretty good eyeliner, excellent if you like a very dark black eyeliner.