Product review (4 stars): Easy to replace water filter.
I have no clue as to whether this filter is properly filtering the water but water quality has not deteriorated and no odor is evident,and so I am tentatively assuming it is doing its job.  The replacement is extremely easy and it deserves the stars for the convenience.  Just fill the replacement filter with water, shake some excess water off, twist off the current filter, and twist on the wet replacement.  Done.