exaggerated, and I'm not looking forward to the regular maintenance, but the water tastes good. And if the filters don't break loose from their bases, they won't need changing for several thousand gallons (or so they say...).
I don't really think water filters in general do everything they say they do. The only way to know is to get the filtered water tested, and I'm probably not going to do that. I'm just tired of lugging bottled water around and then recycling the plastic.