Product review (5 stars): UPDATE regarding the 1 out of 3 that leaked in my fridge
UPDATE 1/24/2017:  Reed (VP Sales  NTSupply) reached out to me via e-mail to resolve the problem.  A replacement for the defective filter is being sent out to me.  It's great to see customer support is alive and well.  I do hope they update the PerfectPure web site contact information.  The e-mail link listed on their site was out-of-order and returned an error message.  When folks buy a 3-pack of these filters, it can be some time before finding out that one is defective, so having good contact information is important.  Thank you for the great customer support.  Buy USA !
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Wanted to give these a great thumbs-up, but my pack of three had one that simply kept leaking.  I tried removing, cleaning the seals, and re-installing.  Kept on leaking slowly; making a puddle in my GE fridge.  Not much of a bargain if I have to throw a perfectly new filter away.  Glad they are made in the USA and cheaper than the factory GE brand filter, but they have to work consistently.