Product review (5 stars): GE OEM REPLACEMENT FILTER BEST WATER QUALITY AVAILABLE
This is the OEM Replacement filter for GE refrigerators.  Even though this filter is more expensive than most after market filters, it's certified to both NSF/ANSI Drinking Water Treatment Standards 42 & 53 which isn't the case with other after market replacement filters.  The price is competitive when you consider the difference in water filtration and water quality which is important if you frequently use the refrigerator water dispenser.  You might not notice a difference in taste but the quality difference is important for your health.  I wouldn't buy any other replacement filter.