Product review (5 stars): Easy to replace
Easy to replace: pop off the top, twist the old one off the receptacle in the fridge, and then twist on the new one. I didn't notice any directions on the item, but my fridge has a sticker that says to run the water for about a minute before drinking out of it, so I did. The water that results is always perfectly clear and clean-tasting; no bits of charcoal like you get with some pitchers or fridge systems. And to be honest, I never really saw the point of Amazon subscriptions, but anyone who has taken a look at a long-overdue-for-replacement water filter can tell you: it's a great thing to never have to worry about that in my life again.