Does anybody here have any experience with this? I heard Dr. Oz talking about how great the filter is for hair (and skin), especially for people losing their hair because it removes a lot of the crap from water and that you can get the filters for your showerhead at "any hardware store". I don't know what hardware store Dr. Oz shops at, but so far I've checked Ace, Osh, and Lowes, and they look at me like I have 3 eyes when I ask about this. So... 1.) does anybody have/use this? and 2.) have you noticed results from it?