Kerastase products have transformed my hair. I was forever searching for my "holy grail" shampoo and conditioner and nothing ever 'wowed' me. I have fine-medium hair but a lot of it. I struggle with my roots getting oily and my ends being dry. My hair also gets very tangly. Since using this shampoo along with a Kersastase conditioner, my hair is shiny, smooth, and I can run my hands through it! It is truly my holy grail, and despite the price I will continue to repurchase it because there is nothing that has worked as well for me.