This is basically a purple shampoo that should take the yellow out of your blond hair and make grey / white hair shiny. Note: This is especially made for these hair colors!
It's smelled really good - like blueberries - and it really cleaned my hair (you know when your hair is squeezing? Yes exactly like that) but unfortunately I don't see the point in that product.
I don't think my blonde hair looks better. It's still the same (I used two of these travel sizes so I had it for quite some time). Maybe it's because my hair is growing out so it's not that noticeable? I don't know.
Have you used some special shampoo? Either for blonde, brown or black hair? And did it work? :)