it works [SEP] i like this i was tired of going to get them tinted every two weeks so i ordered this based on reviews it seems to work fairly well it lasts about a month i do not use an entire capsule from another reviewer i just dumped them all into a little glass jar and dip the dry brush in when i need to tint them and get only as much as i need and add a little of the developer into the little mixing bowl i leave it on about minutes each time the only thing is that i wish it were just a tad bit darker my hair is almost black so it is pretty dark and this can pull it off for about a month sometimes less but it does the job and for the price it is worth it i think