Product review (5 stars): It's a filter
I wish it had a way to tell when it was ready for replacement like those pur faucet filters. It filters water I guess. We must have really hard water because with this filter and an external refrigerator ice maker type filter we still get tons of white spots/residue all over the freezer door water/ice dispenser. We'll consider a whole house filter or water softener next. Water from fridge tastes fine though.