I have used both the Sawyer Squeeze and the Mini fairly extensively and never had a moments trouble. I use it as a gravity filter most of the time and when I do squeeze the bags I am gentle so even the original bags that have caused concern have worked OK for me. I use a cut off bag to scoop water and fill the bag when there isn't an easier way.

I have completely abandoned my pump filter (MSR Sweetwater). I thought it was a great filter until the Squeeze came out. My pump filter weighs about five or six times what the mini weighs and the replacement filter cartridges cost cost twice as much as the whole mini with hose, fittings, and bag. It I was concerned that the mini might let me down (I am not), I'd consider carrying two. That would weigh less, cost less, and provide redundancy.