Peter T.wrote a review of Katadyn Hiker Pro Replacement Cartridge on December 8, 2008
I've used my filter now for about three years and it is one of the best systems that I have ever used. It is lightweight and efficient. I do a lot of tough hiking and it is a very good system. A buddy of mine bought one before deploying to Afghanistan and he swore by the filter. That's what got me looking.