I actually purchased this thinking that it was Define-a-Brow...Then I went home and after a few minutes experimenting with it I finally realized that it was an eyeliner. Oh well.
Nonetheless, it's not a bad brow pencil at all. Brownish Black is actually more of a cool-toned dark brown than brownish black, but it definitely works for my naturally black eyebrows (no red undertones, thank God).
It's very smooth and glides on easily. I can still do feather-light strokes, but this formula isn't the best I've tried for eyebrows. Then again, it's not meant for the brows, so I can't complain.
As an eyeliner, it's pretty bad. It doesn't set itself, so it will definitegly smudge, especially seeing as how easily smudgable the formula is.
The smudger is nice, but if you smudge too much, the smudger will actually start to remove the product.
I also don't like how the smudger cap falls off too easily.
Pretty cheap at only $5. But there are eyeliners that perform like a high-end eyeliner that are even cheaper than this (namely, Prestige and Milani).
Would I repurchase? No.