I've always wanted to get a survival rifle, either one of these or the single-shot break-barrel ones that have over-under .22/.410 barrels.
That said, this is a survival rifle, not a defensive arm. You can use it to pop squirrels when you're hungry and maybe dispatch a rabid racoon, but if I have to defend myself from anything or anyone I want something more substantial.
But if you want one, get one. I will, one of these days.