I am always very sceptic when it comes to shampoos and conditioners. The reason behind it is that I've been trying for years and years different hair products for nothing. They never do what they promise. Last year I tried the Collistar bamboo line avaible at Sephora and to my big surprise it actually WORKED!
My hair was pretty damaged before using those products, but after a few times using them I could clearly see that my hair was restored and I didn't have to struggle while brushing it.