We have it here. The whole Territory has it as far as I know and it works really well. Here it's great because you can't buy grog with it. They have to use their other money for that (and they still do - and before you think I'm all high and mighty, come and visit and you'll know why it's an issue).
All our IGAs take it, no different to eft really for them. It works here to keep money for the 'necessities'.