Sorry to say, but for me they became a solution looking for a problem. The things I would like to keep absolutely waterproof typically don't fit in there, or would be a pain to remove. The things that do fit ... do not require such a sturdy, bulletproof and waterproof container, and will pack much smaller in other bags, pouches or containers.
Guilty as charged!

I confess that I'm a "gadget guy." I can't resist buying crap that looks cool. And I'm the kind of guy that can go into OfficeMax for a box of staples and come out with $30 of specialized notebooks, index cards, report covers, etc.