I am not a stylist, but someone concerned about the condition of my hair. I had a colorist damage my hair to where it was breaking off in clumps! I went to a salon that used the Redken products and my hair color had unwanted red tones and continued to break.  Then I went to a salon in Durham, NC, Bella Trio, that uses INOA hair color.  I couldn't have been happier!!  The damaged hair looked so much healthier after just one color application.  The grey roots were gone and my hair felt soft again!  I will not go anywhere else now and am sold on INOA. I have had my hair colored multiple times now with no adverse affects.  I don't know why others had a bad experience, but I have nothing but good things to say about it.  LOVE IT!!!