This is a few shades lighter than my actual eyebrow, but I feel like it gives a much more natural look. There are days when I don't want bold brows, so I usually use this product to just fill in those sparse areas. Also, it looks good on both blondes and brunettes.
For being a pen, I expected a lot of product to come off, but for my surprise it doesn't. Since it has a felt tip, it's very easy to create straight lines or draw missing hairs. I've seen a few eyebrow pictures on Tumblr that I thought were photoshopped, let me try to explain why, the front part of the brow had a really sharp clean finish and sort of a blurry tone. However, when I tried this marker I noticed it gives the same effect, and personally I think it's beautiful.
If you would like to see a video of me using this product make sure to check my eyebrow tutorial.