Product review (5 stars): Water Sentinel WSG-1 works for me! And, I didn't go broke!
"I received the product as described and on time. This does replace the GE GWF filter (which is discontinued.) However, my filter device needs an adapter, which I already had in place. My first attempt was unsuccessful. Why? My error. I did not turn the filter far enough and consequently the filter detached from the adapter and flew off. No big deal. Second attempt; successful! Just remember to run the water through the filter for about 4-5 minutes.  Water does taster better.