We have been using RO water for drinking, etc, for a number of years. When
you change filters or the membrane, it's important to run several gallons
through before drinking it. Any new filter, in any system, needs to be
flushed when newly installed. As far as taste, I pefer it to bottled water,
most of which tastes 'dead' to me. And most bottled stuff is nothing more
than municipal water. Poland Spring, which you mentioned, is simply good
well water drawn from the same aquifir that is used by surrounding
residents.

Diana