User Review: MSR MiniWorks EX
Price Paid: $79
Overall, this is an acceptable filtering system to take into the backcountry.
Pros include its ability to thread directly to Nalgene-style threading on bottles and hydration bags, rugged and simple design, adjustable float position for proper intake depth, included filter end-of-life gauge, included threaded outlet cover, and ease of field cleaning.
This is not the kind of filter you want to clean water with high concentration of particulate matter! The pumping action becomes extremely hard, and a huge amount of work goes into each tiny increment of clean water out. The outside design of mine was a bit unrefined (sharp edges on plastic from the forming process, etc.).