I picked up 3 boxes of Schwarzkopf Keratin Colour for FREE because I had coupons. I'm not one to stray from my normal hair colour but when it's free...why not right? WRONG! You couldn' t pay me to use this again. Very ineffective...didn't change my hair colour at all. Back to my regular one. I now have 2 extra boxes...into the garbage they go. I wouldn't give them to my worst enemy.