I have a second hand TomTom I got from my brother. I just crossed the Nullabor (also for the umpteenth time) each way, getting back here on Saturday. My map machine did the programming, and the thing took us around the flooded Riverina in NSW. The NSW SES told us where there was flooding, so we took waypoints instead of Canberra.
The roads were a little primitive in places (sealed of course), but it worked a treat. I think it gives constant GPS references, but I can't swear to that.
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