Anyone used this? I'm wanting to dye my hair either the Cyber Purple or Mystic Violet shade. I've spoken to my hairdresser (who has dyed my hair lots of times before, and has done streaks of purple with her own dye) and she says she sees no problem with it going onto my hair, and has offered to do it this time since I've never used a home dye kit. So, what do you think, anyone else used these colours, or any others?