Product review (1 stars): The cheapie fit just fine, but within several days
Thought I'd save money compared to the $50 for a Whirlpool filter.  The cheapie fit just fine, but within several days, we discovered a slow leak under the fridge where none had been before.  After replacing it with a filter certified for use with Whirlpool fridges ($52 at Lowes), we've had no further leaking.