Product review (3 stars): Good but...
Filter does what a filter does.  The water tastes great and the filter lasts the same amount of time as OEM filters.  However, while using these filters, we periodically get a "hammering" effect when water is flowing.  The noise appears to be coming from the water lines and not the filter, but it only occurs when this filter is being used.  From this I have concluded that either the water flow is being restricted or the filter somehow has allowed air to be retained within the water lines causing it them vibrate.