I researched the Berkey years ago when I was starting to make some moves for a shtf-type event, but I just never pulled the trigger on it. We've used the Brita ones, and some other under counter ones in the kitchen.Overall, the municipal water in our area is pretty good, so I think that has kept me from getting as serious about it as I should be. By the time you realize that you really need it - it will be too late.