I definitely think this is a great product and it is definitely much more cost effective compared to other. My natural hair color is actually dark but I am in another Blonde Phase of my life and I can tell that if it is not actually permanent in the sense that I'll stay blonde forever, it is not even close to being over. It does seem to truly repair bonds that are broken chemically when you bleach the pigment out of your hair. The hair is noticably smoother and shinier. It is like the best deep conditioning treatment you have ever had in your life!"