A PND will always win out for me because the Tracks are recorded and I can download them to my computer, the phone and the Tom Tom nope no download only good for around the city "they do work outside of city but map quality drops off " I go up some hard to see tracks when I'm out Gold Hunting and like to D/L my tracks into OZiexplorer and view them on different types of maps. ie Topo, Geological, Tenegraph and the odd older Cadastral maps.

So PND's will be around a long time.

IGs