ok to darken brows do not buy to cover grey hairs [SEP] 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 is 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 did not cover the greys at all although i really only deposited the color on that area update i threw it out total waste of money now i use anatasia dipbrow pomade every single day it take an extra seconds to apply but it quickly covers the grey hairs in my dark brows stays put no matter what i do and for sephora it is a little bit more on amazon but i still think worth it it is 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