One Star Means that the Hyperflow "Straight Up Sucks"
Summary: 5 trips over 16 months; 3 brand new Hyperflow filter cartridges; 38 to 45 liters of total water filtered before failure of all three cartridges. I even added a MSR SiltStopper ahead of the 3rd brand new cartridge and it failed just as quickly. (Note: I'm a mechanical engineer and I followed recommended back flush intervals and techniques "by the book")
I like the Hyperflow specs on paper but field use tells a different story. Im afraid that I need to give up on the MSR Hyperflow product and move on.