Works well until brushed up against a sharp limb, razor-sharp Whitebark pine bark, or a rock, or a swinging hiking pole tip.
May be okay for a limited "3 hour tour" or an emergency kit in the trunk of your car or daypack, but I would not trust it beyond that. Even 6 mil plastic can rip.
I am sure there will be testimonials about the durability, convenience,and lightness, but Murphy is everywhere.
The first order of business is survival - that means staying dry.
