Product review (5 stars): Prompt customer service
So this filter does not replace my GE smart water filter as my GE frig is year 2001.  Very frustrating.  The top is not compatible.  However,  I just bought a converter and hope that may work.  I revised my original post because the company waterfall filter offered me a full refund even though it was not their fault that I have an old frig and the mwf design has changed. So great service I am sure their filter will be good also. I hope it fits my "old"  frig.