I'm in love!
I was extremely excited to try this out that when it came in I tested it it on my two room mates. Each of us have different hair color (blonde, black, and myself reddish), like I figured the color showed up the best on my room-mate who had blonde hair. It worked alright on my hair and on my room-mate with black hair (we used yellow in her hair) showed up gray after flat ironing the color in. I'm going to try layering colors on her hair, might show up better!
Rating: 4 stars