Yes - I found this made a difference for me.
I was did a lot of research on my hair type, what products I need to use but I was not getting the results I wanted. The tap water here is hard and has a lot of chlorine - you don't want to drink it unfiltered, but I was still washing my hair with it. My hair is finally coming around after installing this -Aquasana Deluxe Shower Filter.
I had this one before - AquaBliss and liked it, but I was living in an area with better water. It might work fine here too, but it's not the one I'm currently using. It's half the price of the Aquasana, which is big and messes up my shower head attachment.