After reading many reviews online I thought I'd give one a try. Combined with a CNOC Vecto bladder using this to gravity filter many litres of water was just a breeze! Saves an awful lot of fuel and waiting time vs boiling water and doesn't leave a nasty taste in the water like the chlorine tablets. I just filled the 'dirty water' bladder, hooked up the sawyer, pulled the mouthpiece valve off the camelbak and then plugged the hose directly into the filter which has the right sized nozzle moulded straight onto it. Hung up the dirty water bladder higher than the camelbak to be filled and a few minutes later, camelbak was full. It is that easy! I filtered all the water for our party of 7 with minimal time and effort. For not much weight or hassle I'd definitely recommend one of these to filter all the water during hikes.