I use this too. Got tired of carrying a filter, and iodine makes my throat feel like crap. Been carrying the katadyne tabs as backup. So far I’ve had good luck, it’s worked well, filters very quickly, and weighs next to nothing and takes up very little space. For under 40 bucks it seemed like the best way to go for me.
Only possible issue I see with something like this is freezing weather could be an issue on a filter that has water in it.
