Product review (4 stars): little tricky to remove and install
These are a little tricky to remove and install. They require more force than you'd probably like to use, since the head is all plastic, and you don't want to break anything. They recommend dispensing 2.5 gallons of water prior to using the water for drinking. I noticed that even after I did this, I still detected a minor odor/flavor of plastic, but it didn't last very long. I hate discarding that 2.5 gallons of water, so I tend to use it to water plants.