Product review (2 stars): Thanks GE for making me spend more money than I really have to..
it works, yes.  is it worth the money? no.. it is interchangeable with the non-E version (the only difference is that this WFE has an RFID chip to let the fridge know when the filter is past due for a change.  I have read somewhere that if you used a non-E version on a WFE specific fridge, the fridge may just disable the water and ice functions all together because it thinks you don't have a filter in place.. so far there are no other good substitutes..