We are using a rental car for the whole time we are there ( except in Rome ) and were wondering whether it might be a good idea to buy an "Italy" memory stick for our portable car navigation ( GPS ) to use over there ? any experience with them ? There are probably good Italian Automobile Association road maps, but not having the driving experience there before, we're unsure. I believe the sticks are about A$300 to buy, so I don't want to if it's not a big advantage ! Any other suggestions re driving, parking, security etc ?