Product review (5 stars): GE GXRLQ/GE GXRLQR
Fast, Easy Installation- ( GE GXRLQ ) Replacement Cartridges( GE GXRLQR ) Should be a little Cheaper- they seem to be priced the same or a little more than the original system.  Say's 3 month's/750 Gallons...we shall see.  Slickest Thing I Found if your Fridge does not have Filtration Built in. Found on Amazon about $10.00 Cheaper than Home Store even paying $4.99 shipping.