After my dissapointing Befree unexplained clog in the Grand Canyon where I was glad to have a slow but dependable Sawyer Mini as backup I wrote Katadyn. I sent it back and they replaced it. It was a nice gesture but I'm not sure what I'll do with it. Maybe I'd trust it on a day hike, but not overnight. The Befree seems at least as susceptible to silt and minerals as any hollow fiber model but is unable to handle the backflushing and vinegar treatments that are the only cures. I bought a Squeeze, it seems like a safe step up from the Mini and still far lighter than my old Pure Hiker.