Product review (5 stars): Expensive, but...
The three pack seems to be the best and cheapest way to get filters for the GE fridges that use them. I find these work relatively well and make our already decent tap water taste just slightly fresher. Make sure you run some water through the filter first. I've had occasional problems with water pressure from the fridge tap with these, but usually it can be solved by re-seating the filter and running some additional water through.