We have one in our BA V8 Fairmont Ghia. Im not sure if it covers all the cities but i know it does more than the capital ones. I live in Townsville and it does everything around here, also we took it to the Gold Coast when we went away and it did all the cities inbetween and i set it for some streets in rockhampton, and it did them no worries.
It comes on a DVD and the DVD drive is niceley hidden in the boot. Operation is all done by a remote control, need touch screen :)
Only problem i've had with it, is the voice navigation feature is hard to hear at max. volume when u have the readio on, and the guy at ford reckons the otherday it needs an inline amplify but Ford haven't made them yet?
If you have anymore questions, ill try and answer them for you.