Review (5/5): Wow!
My hair is medium blonde and a little longer than shoulder length. I only used about half of the container of dye to saturate my hair. Then I ran a comb through it to make sure that it was distributed evenly.
I covered it with a shower cap to help warm it up, and left it on for an hour. Then I used a blow dryer to completely dry it before I washed it out.
It made my hair not merely purple, but PURPLE! I love it!