The highlighter on the other end really does a nice job of making the shape of your brow pop, and the pencil/shaper end gives you some fullness/shape without looking like, "Oh, she pencils in her eyebrows!"
I have really light brows and was having trouble finding a good color match. This Anastasia pencil has done me well. I think all of their brow products are pretty respectable.
I got it from Birchbox awhile back when I had some points. It's nice. Very fine tipped, so it makes natural looking strokes. I like that it's twist-up, too. No sharpening. I forget to use it, though. I need to remember.