Hello Knowledgeable Children Of Oldies 
I am going through some fairly painful conversations with my remaining parent. I am pretty clued up on what a POA is, and how to get one, as am currently on the 3rd or 4th draft with aforementioned parent.
What I don't actually really know is, how does it work IRL? At the moment, it is the financial one I am particularly concerned with.
As far as I can see, nothing financial related would need attention urgently? For example, it would be possible to speak to a bank and explain the scenario and then sort out what was required, and that could happen over a period of 5-10 days, rather than within 24 hours.
I'm probably not explaining myself very well, but I am pretty much at the end of my tether as this has been going on for well over 5 years and involves some fairly heated arguments. I have siblings who do nothing, but insist they have to be involved. They won't sign unless POA is set up as they want.... But it's the POA in action I'd really like to get a handle on.
Any RL experience would be welcome. You can also tell me what it's like if you DON'T have one in place, but I am pretty sure that is a total PITA.