Review (4/5): So far so good
The product is easy to use. Unless you're very careful you'll need gloves, it really stains. I left it on my brows for 2 minutes then for 1 minute more. It gets a little darker after you wipe it off.
The capsule is not easy to open. I needed to cut it open with scissors. The amount per capsule is a lot more than necessary for one use, so if you have a way to save the powder you can make one kit last a very long time.
So far I didn't have any allergic reaction to the product. I'll update if I develop any.
Overall I'm happy with the color, let's see if it will last long. Now I just need to master the art of filling my eyebrows properly for a better shape :-)