Michael T.wrote a review of MSR AutoFlow Gravity Filter Replacement Cartridge on August 20, 2016
Familiarity: I've used it several times
Purchased the MSR Autoflow for a base camping wilderness canoe trip. I used by old Katedyn Base Camp water bag (cut off filter) and connected the MSR in line. This filter provided good, clean filtered water. After to flow slowed (~ gallons), I simply back-flushed the filter and it performed as good as new.