Review (3/5): OK to darken brows- don't buy to cover grey hairs
I bought this product to cover grey eyebrow hairs and it does NOT- thus the three stars. But if you are buying it simply to darken your normally light eyebrows I think it would work just fine. It's easy to use. The capsules are a little fiddly so open it over a paper towel or something in case of a spill. I bought dark brown and it darkened my already mostly dark brown eyebrows but didn't cover the greys at ALL although I really only deposited the color on that area.
1/28/18 update: I threw it out- total waste of money. Now I use Anatasia Dipbrow Pomade every single day. It take an extra 30 seconds to apply but it quickly covers the grey hairs in my dark brows, stays put no matter what I do, and for $18 @ Sephora (it's a little bit more on Amazon but I still think worth it) it's still a better deal than going all the time to have my brows tinted professionally every few weeks. You only need to use a tiny, tiny amount so start slow and use a good brush.