Product review (4 stars): Just bought a new one, put it in and ...
Just bought a new one, put it in and it made grinding noises, put the old one back in, no noises, called whirlpool customer support, they said "give it time", so I'm just gonna listen to my incredibly loud water dispenser for some indefinite amount of time and presumably it'll either stop or I'll become accustomed to the noise.

After several gallons of water went through the filter, the noise stopped and it is working fine now.