Product review (4 stars): Good Tasting Water. Hard to Tell about Some Other Things!
Without a chemistry degree or a great chemistry set, it's impossible to know how much something like this really does for the water. Having said that, the water it filters tastes good and the tank is relatively easy to install. I have been using this filter for my Samsung fridge for years.  The only drawback is that the light that alerts us to need a replacement seems to come on often.  I don't cook a lot and I have a filter on my kitchen tap for what little cooking I do, so this gadget only filters our ice and half of our drinking water (my husband buys his drinking water in bottles). Still, I'd rather replace often than risk drinking gunk! (-: