In that situation mark I can't think of a single other gun ide rather have in my hands. That's when they really come into their own and can't be beaten, not just a hw100 but any similar multi shot PCP.
I've never ownd a PCP , never felt like I really needed one. Doesn't mean I've not been in a situation where I could have needed one, reading posts like that just makes me realise how many I have been in and only bagged the 1 due to reloading,sound ,movement ete I now realise I DO need one. It would HAVE to be a hw100.