Product review (5 stars): Buy this, DON'T buy the cheaper knock-offs or you will be sorry!!!
Please do yourself a favor and buy the authorized manufacturer's water filter replacement for your fridge!  I tried to save $20 and buy a knock-off that claimed to be compatible with my Kitchenaid fridge and what a mistake.  First, the knock-off it did not seat well and the system lost pressure so water flow trickled to almost nothing.  Second, the connection was not a perfect fit (as it was supposedly a replacement for several different fridge models) and broke the receiving end when I tried to screw in it.  All of this resulted in my needing a new valve, which with the service call cost me about $225.  So I bought this product, which I should have bought from the beginning, and now everything works perfectly again.  It fits perfectly, runs quietly, and once again I have a strong flow of water.