Josh Saint wrote a review of Katadyn Hiker Pro Water Microfilter on January 11, 2011
Started using this filter back in the early 90's along the A.T. when they were owned by and labeled PUR. This a great filter. Easy to use and faster than most. The construction of the filter is great just do not put all 200 lbs of your weight on the handle to pump when the filter clogs, it may break. (did not say how smart I was). The filter is compact and lightweight.
One change to make on the filter. Get rid of the "acorn" on the end (it is heavy) and buy a fuel filter for a 71 VW.(buy palstic not metal) cut intake hose in the middle and place the VW filter. The VW filter weighs less than an ounce cost about a dollar and will tipple the life of the main filter.