Sounds like the line for the latrine was a bit too long
That looks like a great filter, well worth the expense.
It depends on the situation though. A filter in the winter here would just freeze solid, destroying it.
I remember a WY backpack elk hunt with my dad where the zone started on a ridgeline 3 miles above the trailhead. There was a muddy, trampled spring about a mile from the ridge where the outfitters would water their mules. I hauled a couple of gallons of the water up in my gore-tex jacket and we boiled all of it over a fire. All of it.
We sometimes boil the water in the winter because there is no choice. Fuel cartridges weigh much less than water, and snow doesn't require hauling. Boil water, do the cooking, fill the thermos, some in a bottle for immediate use or in the sleeping bag - done.