I actually have used kits similar to this, except the gear was alot heavier.
I have confidence in the plastic sheet as shelter, using the Boy Scout way of doing it by putting a rock in it then tying string around it. I actually have used this system (not as shelter but gear storage) with good success in windy weather, as long as it wasn't pitched more than about 4ft. high.
Mine weighs 6oz with the ridgeline and guylines,
the durability is good, for a couple nights, as long as you are gentle. C'mon guys! knowledge and care can be traded to carry less weight.
yeah, that Clothing worn error was a typo.
And yes, I am a big guy, and I don't want to go too hard-core, since this wil be my first SUL trip, and there isn't too much margin for error.
What I meant about the temps was NOT below freezing.
If you think that temps down to 33F with summer clothing worn to bed is litle extreme, maybe for you, but not me! I am a toasty oven sleeper.
I have gone without a sleeping pad before, even without building a bed of pine needles and boughs, (in summer).
I plan to use this on a car-camping trip the first couple times.
Godspeed and go light,