Product review (5 stars): Works great, zero issues
Purchased for KitchenAid KRFF305ESS and it was a perfect fit, easy to install.  Have read that some have issues w/ air in the line or difficulty to install and we experienced none of these.  Agree it's expensive for what it is and I would say you don't have to replace every X months, just leave it in there until noticeable decline in taste.