Product review (4 stars): As far as I can tell these are as goods as the 2X expensive OEM versions.
These work fine.  The people who sell the OEM versions would like you to think you'll grow two heads if you don't use their "twice as expensive" versions, but after two rounds we have no problems.  We probably don't even need a filter like this because we (fortunately) have good quality water here.  So - it you have a lot of lime or sediment in your water, I can't say how this will work, but for good Michigan straight, these are fine.