I got the shade dark brown. The claim that the result can last up to 4 weeks is false. It lasts for more than 10 days. The usage instructions regarding the quantity per use apply if you have thick eyebrows. If you have normal eyebrows, use half the amount. The waiting time of 5-10 minutes is false unless you want the result to last only 3 days. You can see the developing when it becomes completely dark, then remove it. 30 minutes to 1 hour at most. Because the developer loses its effectiveness after 45 minutes. It is easy to mix and clean. If you remove it with a dual-phase oil (because they even remove waterproof makeup and it's good if you use them), then the duration on the eyebrows will be reduced. I combine it with clear brow gel and a little eyebrow shadow for a natural result. Compared to other home-use eyebrow dyes, this is the best one so far that I know of. Just the claims and instructions are somewhat off. PS I forgot to mention that it doesn't last on the skin for more than 2 days. So people with alopecia or eyebrow loss due to chemotherapy, or permanent loss due to years of tweezing won't benefit from it. It's much better to do browblading with a specialist to be safe.