Rod T.wrote a review of MSR Guardian Purifier System on May 30, 2017
Familiarity: I've put it through the wringer
On the pct my 3 liters were running low so I decided to test this on a really nasty small pond in Oregon. To my surprise the water went from a dark green/brownish color to completely clear. Ok it's going to taste like crap though right? Not even a little. It tasted great! Better than the smart water bottle I still had partially filled with hotel water. I ended up using it everywhere even though I really may not have needed to just because it was so fast and easy, why not? It was always worth it, even if simply to improve to the taste of my chicken teriyaki meal I was about to rehydrate:) I highly recommend this purifier! I will always be looking anywhere else to shed ounces as the Guardian will be an essential part of my backcountry kit for years to come.