Covered fairly well and was easy to use so if you are trying to cover a lot of grey it will take more than 10 minutes. I did the patch test but a few hours later my face is a mess with a rash, so be careful if you have sensitive skin. I will not be using this product again.
Mostly a good product with good coverage and actually better coverage than many professional brands that are supposed to work in 5 minutes. However, some of my white hair get a reddish tone once it fades (which happens with products of other brands as well). I wish Clooney Club would also add some ash shades.
Fantastic hair dye, looks quite natural and leaves my hair smooth and moisturized every time I use it. Great packaging as well.
P.S. For better grey coverage, use it for longer than 15-20 mins, but buy a lighter shade than your hair because leaving the dye on for longer will result in often much darker hair than the shade you wanted.
Do the patch test! I didn't and my face is on fire, great colour but not for me. I've been using just for men but recently reacted so tried this, looks like I'm going grey