Product review (2 stars): Not compatible with all GEs
I purchased 2 of these with the hopes of saving some money and was encouraged by most of the good reviews.  Unfortunately this simply isn't compatible with my GSE23 refrigerator.  It fits into the socket, but the opening where the water flows through is noticeably smaller than the official GE filter's (Photo: EcoAqua on the left, GE on the right).  Because of this, water flow through the filter is either severely reduced or stopped altogether.  The fridge's pump is very loud when it tries forcing water through, which I'm sure isn't good for it.  On top of that the water tastes like it came straight out of my garden hose, even after disposing of the first 2 gallons like the filter recommends; which is why I suspect water isn't even passing through the filter.

Some refrigerators may have different specs that this would be more compatible with, but this was a total fail for mine.