Review by: jimdavis, 2004-09-30
The Katadyn Guide is one of the best filters out there. It is the fastest I've ever heard of, filtering a liter of water in 30 seconds (with a new cartridge, and 41 seconds after a lot of use), it is very reliable, and fairly compact/ light.
The Hiker is a little lighter, but takes about 3x as long to filter water, making the Guide the choice for big groups and base camps.
The Guide's filter is also not a ceramic like the MSR, so it won't break on you in the field. Also, the it has over 120 square inches of surface area on it's filter, compaired to the MSR's 8 square inches, so it is far less likely to clog on you.
It's plastic output hose end fits on Narrow Mouth and Wide Mouth Nalgene bottles, and has an optional adapter that screws directly onto Wide Mouths. It also comes with an adapter for Quick-Fit hydration systems.
It only weighs a few ounces more than other filters, and is remarkably faster and easier to use. If weight is not your #1 concern, consider this filter.