I have very fine straight hair and it is color treated. I use this conditioner every time I shampoo (sometimes I shampoo daily, sometimes I skip a day). My hair is shoulder length and I use an amount about the size of a large pea. It will not feel like cheaper conditioners - it's not as slippery, and it will seem like you need more, but you don't. I just smooth it over my wet hair, let it sit for a few minutes, then rinse. My wet hair combs out beautifully, and after a few months of use is in MUCH better shape. Also, my highlights last about twice as long as they used to before I started using this (accompanied by a Kerastas shampoo). I used to have to highlight every three months, now I can go 5-6 because the color lasts so much better. I was skpetical at first and still hate the price, but now I'm a believer.