Have also tried a similar creme product and although the convenience was great, it wouldn't activate and stain well (and yes ...
Works well for sparse eyebrows and helps stain skin where there are no hairs ;) The longer you keep this on, the darker this gets (brown/black). If you have very sparse eyebrows though i.e. areas where there is really no hair, the dye will not last more than 3-4 days because it is on skin. If you have a little hair, then no worries-  dye will probably last for a week at least (6 weeks HIGHLY unlikely). Have also tried a similar creme product and although the convenience was great, it wouldn't activate and stain well (and yes I used chemical i.e. peroxide gel/creme as specified). The powder capsules can be opened and used in smaller amounts since you won't need a full capsule for each use, so this is a very economical buy. Carefully open the capsule, place the powder in the included grey cap, or on one end of a plastic soup spoon (easier to clean) and mix with the creme. That's how little you need.
Rating: 4 stars