Charcoal filters are the way to go. Forget spending all that extra money for the three filter systems and the maintenance that goes with them. That can get expensive and are a waste of space. We're so spoiled now, worried about what we drink and eat. I carry bottled water for drinking and such (for better mileage, my water tank is not full while traveling) when we hit the road. Even though I still drink water from the tap on my bus, the grand kids wont. You can spend a lot with hard water treatments and I'm not so sure about the city water causing all that much damage. It takes a lot of time of the continual use to cause all that fright. I even save and rinse out the used bottles and refill them from home and put that in our refer and there is no difference in the taste and any after effects.