I like the Sawyer mini also except for certain situations.
On a hike in PA a couple of months ago, the source of water was a very shallow and barely moving creek. I could not get the water bags (that the Sawyers come with) filled and expanded at all. It was a PITA to fill the stupid plastic bladder bag with a trickle from a cup so that you then squeeze a trickle through at a time. A buddy with an MSR pump just stuck a filtered hose in the water and pumped his fill lickety-split.
For a few ounces more, I'm thinking of packing a Katadyn mini again or picking up a Platypus zip bladder for easier filling for those types of situations.
