Product review (5 stars): I'm completely satisfied.
In life you get what you pay for. Yes, the knock off versions can be purchased for less and they should do the basic job of taking away the chlorine smell. In the end I decided I wanted more than that. I wanted to know that the filter was capable of removing particulate impurities in addition to the baseline chlorine removal. It's a quality product and for that you must pay a little more. I'm completely satisfied.