Product review (5 stars): Expensive, but essential to use my fridge. And I survived Toledo's water apocalypse of 2014.
First, let me start by letting you know that I live in the Toledo, OH area, and am an indirect customer of Toledo's city water.  Toledo has been very negligent in maintaining their water treatment facility over several decades, and it can't properly filter some of the microcystins that more modern treatment facilities can.  Another toxic algae bloom formed on Lake Erie (a big thanks to the polluters for endangering our water supply), and drifted near the water treatment facility's Lake Erie intake, contaminating the drinking water.  Thanks to our local media, panic ensued, and folks bought up all the bottled water at stores, and water filters.  Restaurants were closed, and many citizens didn't realize that it wasn't a nationwide water apocalypse--you could drive 15 minutes to a town that had it's own water treatment facility and stock up.  When the great water catastrophe was over (3 days), customers had to flush their pipes and appliances.  That's when having a spare filter like this on hand really helped.  Buy a few from Amazon and save over buying them locally, keep a case or two of bottled water handy, and you'll be able to ride out the next water catastrophe in style.  Just beware of those pesky walkers.