Katadyn ne PUR
JD Bkpkr: 
The pocket filter is great, but heavy. I have used at least six other filters and broke them all. This one can not be beat for capacity and durability. The weight is worth good water and this particular filter could easily be the only one taken with a small to large group. I wont carry anything else except maybe micro pur tabs when the water quality is known to be good already.
2003 model
Capnsutton:
It seems the 2003 model of the pocket filter no longer comes with a brush, but is supplied with two green scratch pads. It also comes with a tube of silicon grease and a spare small "O" ring. The bottom of the filter is now flat so that it can be firmly placed on the ground or other surface without trying to balance it on a narrow bottom plate. Another improvement is in the output nozzle. It screws into the top plate and will allow a tube to be run to the container. A metel clip is provided to secure the end of the tube to the lip of a container so it will not "flop around" during pumping. Lastly, the handle has been re-engineered into a mushroom shape which allows much more comfort while pumping. No more "T" handle! At 13,000 gallons capacity per filter, the average owner will never see the day when it must be replaced, unless it is broken. The unit is built to last a lifetime, and comes with a lifetime warrenty, but weighs in at 20 oz. As an active duty U.S. Marine, this is the model of choice for uncompromising performance, durability, and maintainability in a field environment.
Katadyn Pocket Filter
Chris Hudson:
Been using the filter almost 6 months now whilst traveling through Central and South America and it's performed faultlessly. We even used it whilst trekking the Inca Trail to Machu Picchu and in muddy streams. It's saved us having to buy lots of bottles of water. Excellent product.
Simply the best
dkallan:
This is simply the best filter out there, in terms of durability, capacity, and effectiveness. It is also extremely heavy and not at all compact, but I would choose it any day over the smaller and less durable Katadyns or any other brand. As an added measure against chemical impurities (which are not filtered by the ceramic element), I use the StopTop from my old Pur Scout on the output hose. The StopTop uses activated carbon/charcoal in a manner similar to Brita or Pur pitcher filters to statically absorb certain chemicals (additionally, the StopTop perfectly fits wide-mouth Nalgene bottles). Apparently, Pur stopped shipping the StopTops with their filters because the charcoal also interfered with the purifying iodine, making the main filter less effective. I don't know if the Katadyn would have the same problem, since the filter is silver-impregnated ceramic, but it sure is convenient. Take note that the instructions are a little misleading about cleaning, since apparently the handled cleaning brush is no longer included. Instead they provide large scrubby pads to clean the filter. Highly recommended.
Tremendous Filter
busotti:
The sturdiest filter out there and it really doesn't weigh that much more than the better filters that cost $70-80. It is rated to 13,000 gallons- much, much more than its competition. By the time you've replaced a filter once or twice on the competition you could have bought this beauty. Search around the internet, you'll find lots of stories about the problems of other filters, even the plastic breaking. Tips to prolong the life of these things: 1) Use a rubber band to secure a coffee filter around the intake filter (to remove large sediment); 2) Use running water from streams/rivers when possible; 3) Using the floatation device, withdraw water from near the top rather than the river/lakebed, where a lot of sediment is stirred up.
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