I needed the filter for a camping trip that came up on short notice. The owner went out of his way to ensure that I had the product in time for my trip. The filter worked flawlessly. Grade A customer service.
The Sawyer Micro Squeeze Water Filtration System is an excellent choice for one or two persons' use while traveling, camping, and other situations where you may need to drink water of unknown safety. The kit is small and lightweight. With proper care, the filter is very long-lasting and does not involve the regular replacement of disposable filter elements. I filtered some pond water, which, although clear, was likely to have contained some bacteria, and the resulting filtered water was fresh-tasting and apparently potable (no ill effects post 48 hours!).
Assuming relatively clear water and an unclogged filter, the unassisted (gravity only, no squeezing) drip rate was about 250 ml/8 oz. per minute, so it follows that with a bit of pressure on the bag, the rate could be increased somewhat.
One thing I might recommend to the manufacturer is a step-by-step instruction sheet with pictures, as there are a number of similar parts with similar names, and it took me a little while to figure out which end to connect where. The manufacturer's video on the amazon page describes how to backwash after use, and this is important in maintaining efficiency and safety of the filter.