Chi Hwrote a review of MSR TrailShot Microfilter on August 7, 2017
Familiarity: I've used it once or twice and have initial impressions
I used this water filter last weekend over 3 days in the Alpine Lakes Wilderness. It was a major weight/space saving, and I was able to filter 1L of water in about a minute. I was also able to filter from a pool of water only 1 or 2 inches deep. Another excellent product from MSR.