Product review (5 stars): ... water that has questionable taste and makes it very good. Tried the cheaper non OEM but the difference ...
This take house water that has questionable taste and makes it very good.  Tried the cheaper non  OEM but the difference is that this has a charcoal filter and those do not.  The cheap ones have a filter of some sort but do not change and improve the flavor which is what I needed.  This did the trick.