Product review (5 stars): same as GE smartwater filter
looks a little different, but installs and works the same as the GE smart water filter.  O ring seems to be thinner than the original, but works just the same.  Comes with labels to  identify installation month.  Much better price than the GE.  Flow seems to be about the same.  Only had to fill about ten glasses of water to get clear water.  The sentinel brand took about 25 glasses until the water was clear.  Hope these last just as long.  The sentinel lasted 9 months.