I am disappointed that in the 5 years since I purchased my refrigerator, GE discontinued manufacturing the RPWF filter (issued with the appliance) within the first two years, replaced it with the RPWFE (which was an acceptable substitution) and then re-designed the RPWFE which now does not serve as an acceptable substitution.  I am hopeful that this review (along with many other consumer disappointments) will motivate the GE design team to create a better water filter product.  I returned my recent RPWFE purchase.