Richard B.wrote a review of MSR MiniWorks Ex Water Filter on August 27, 2014
Familiarity: I've put it through the wringer
I've owned the three different water filters and this one is my favorite. I like the ergonomics with how it pumps water and I like the fact that it screws to a nalgene bottle. Whatever model of water filter you get, try to avoid getting one that pumps up-and-down because it will eventually become a burden.