This stuff produces terrific hues! I've been using it for almost a year now (on bleached hair as I don't quite have enough natural grey yet, and am still kind of a dull brown). It smells wonderuful, and my hair feels really good.

If you try it at home, I advise you to create as many barriers between it and your skin as you can -unless you want to be blue for a few days to a week! I wash it out wearing two pairs of gloves and still manage to end up with smurf palms. (I'm not a professional, I do my own colour.)

But whatever, it's worth it! This one also fades considerably less (and less quickly) than the other blue shades in the same product line.