Product review (3 stars): It's a risk.
The filters come with a bright "Assembled and Tested in USA" sticker but the fine print on the label says made in PRC for Eurotech Enterprises.  Usually I won't buy China-made products that have anything to do with food or health even for my pets.  Remember the pet food contamination scandal a few years ago?  I was fooled on this one as I did not see a "made in China" on the advertising page.  I'll give it a try but other reviews show a big problem with really low quality filters sold as replacements for the terrifically overpriced OEM ones and this could be one of them.  Won't actually use it until the current filter gets replaced in 6 mo.  Then I'll cut apart an OEM and a replacement and see if I can detect a difference.  Even then I won't know if it is actually performing per the promise.