I bought this shampoo, along with the conditioner 4 months ago. First off,it's only just run out, and I wash my hair 3/4 times a week. So although it may be more expensive, it really is cost effective. My hair has never been in such good condition! It looks so healthy and shiny, and everyone comments on how lovely my hair looks. I colour and straighten it, but since using ogx it's a no longer dry and snapping off on the ends, which it always used to do. I never usually write reviews, but I think so highly of this product. I promise you won't be disappointed! I'm so glad I started using ogx and will never use anything else on my hair again. Cannot recommend enough!