Got one the other day, just to see what it's like, and having the thought of using it for either a wind break or something to reflect the heat from a nice fire. However since it's not fireproof, that's one less option.
It's very thin, I wouldn't like to have to use it as an emergency shelter at all, while it is light weight, compared to a small light weight tarp, it's really not even in the same game never mind same ball park. For a quid is it worth using as an emergency shelter? Only if thats all you've got, and if you go out with it and not something much better suited to the task, you are really asking for bother. I haven't tried the burn test on it yet, to see how badly flame will affect it, but considering it's so thin I can easily watch TV through it etc, I can't see it resisting much to flame, or to anything that might rip it either. Being held together with 3 bright yellow bits of packing tape as well, not entirely inspiring to one's confidence.
Still, a decent wind break I think..
Cheers,