Product review (2 stars): your water is probably pretty safe to drink
First of all, unless you live in Flint Michigan, your water is probably pretty safe to drink.  The EPA website -for now- has a list of water quality reports for most communities in the US which have public water distribution, I.e., not well water.  My town was >90% for water purity, so it's safe enough.  Most people should buy a filter to remove chlorine and improve taste, that's really the only reason to buy one.  These filters do an OK job of improving taste, but the flow begins to diminish after about 6 weeks in my fridge so, they're not that great.  Am not buying again.