L'oreal Superliner Carbon Gloss is my favourite 'drugstore' eyeliner, I've tried the Collection 2000 liner and found that it rubbed off easily and didn't last most of the day and didn't stay black.
I first read about this eyeliner through blogs and thought I should try it and I love it so much, its so easy to use. I love how long the applicator is on this eyeliner, it makes it so easy to do a fick and the pointed tip means that you can get a nice thin thick. Also with the softness of the applicator you can apply it with various pressure and do a thin or thick line. I also love the blackness of the eyeliner, however it rubs off quite easily if you rub your eye by mistake.
I still find it quite difficult to do eyeliner flicks but with this I find it quite easy and it helps with the application.