My wife and I bought a Nature-Pure filtration system four years ago when planning a lengthy trip through Mexico and Belize. We have used this system in our motorhome since 2005 throughout the mainland of Mexico (3 trips), Belize (1 trip), the Baja Peninsula (1 trip), all over Canada and the U.S. We never buy purified water anywhere. The water we use from the dedicated tap in this system is clean, safe and tasteless. Montezuma's revenge is not a part of our vocabulary. I think we've put it through the ultimate test and it passes with flying colors.