Works Good...Except For That One Time...
I used this as my primary filter for all my trips until I got sick last year...I'm not sure how I ended up getting sick because my filter still had life in it according to the 200 gallon life on it. I was already a little fed up with using this filter because the bag that it came with was cheap and the zipper broke. I was also tired of putting away all the pieces and trying to keep track of what tube was the "clean" and "dirty" tube. Call me lazy but I hate stopping and messing with the entire filtration process. I now just use iodine pills mixed with some powder gatorade to kill the taste. You need to let the iodine sit so I always have a backup bottle just in case I can't wait the 30 minutes.