Like others, I have been using this for years and was really impressed with the results. I have dark hair and grey around the sides so just used it for blending really.
Straightway noticed a different color of foam in the hair, sort of a red plum color, unlike the previous black. The box also now says this is for any shade of hair, whereas before you could get a version for dark hair. It doesn't work and I have left it on for longer than with the original formula, and yes, even my dark hair is getting a yellow golden tinge to it!
Don't get it. I can't find the original product for sale anywhere and the box design has changed several times since the new product was introduced, by the looks of it, I guess due to complaints to throw people off the scent. Bring back the original version or I think there may be a class action on the horizon!
Length of Use: 2+ years
Bottom Line: No, I would not recommend this to a friend