I've used this shampoo a couple times and so far I'm totally obsessed. One thing that almost made me want to take off a star was that it doesn't lather very much, which I guess I need to get used to, but I use SO MUCH more product when it doesn't lather so it could expensive. But even with this minor issue it's worth it for the final pay off.
I noticed that my scalp isn't as itchy, and my hair is super light and clean. It's actually one of the best shampoos I've used in a LONG time. The smell is also really nice.