I've used this twice and it was really good, although cost me Ł300 and took about 5 hours. Lasted about 5 months. I have fine frizzy hair and always blow dry it straight and use GHD straighteners. My hair is highlighted blond (treatment is not good if you have bleached hair) After the Yuko treatment my hair was so much smoother and easier to style - will do it again - when I can afford it!!!! I felt really glam!