Product review (4 stars): I had some trouble getting the new one seated properly ...
I had some trouble getting the new one seated properly.  I was able to screw out my old one by hand, but when installing the new one, I couldn't get any water out of my refrigerator because the filter hadn't been screwed in far enough.  I had to use a spoon handle that fits in 2 slots on the end of the cartridge in order  to get enough leverage on the cartridge to fully seat it to the refrigerator.  The directions weren't clear about this requirement and had to go online to troubleshoot why I wasn't getting any water out of the water dispenser.