Read reviews for the Miniworks Water Filter by MSR as submitted by your fellow paddlers. All of the reviews are created and written by paddlers like you, so be sure to submit your own review and be part of the community!
My main complaint is that the Mini is designed to screw onto the top of the MSR, Reliance and Nalgene bottles. As I had a brought a few off-brand bottles, I found that, in the field, the openings and threads did not match! AS I am unaware of any adapter for the hundreds of knock-off bottles, if you buy the Mini, be certain to take ONLY Nalgene and Reliance bottles with you.
This is why I gave it a 7, the requirement for a specific water bottle when many of us bring the ones we are given as gifts by companies seeking our business.
Last year I purchased the MSR (Mountain Safety Research) Miniworks EX. I'll say right from the beginning that the first one I bought failed on my very first trip resulting in me having to cut my outing short by two days. The pump pivot pin broke and though quite a drag, the good folks at REI replaced it, no questions asked, with a brand new filter unit. They said they'd had two others returned for similar failures. Likely a bad manufacturing run on the pins, things like that happen in production. They made it right. I'm happy. Since then I've used the filter on a number of trips and I feel that I can now offer an honest review of the product.
Read More at my blog: thedamntrueexperiment.blogspot.com