It's a cracking little unit and as you say benrace it saves you having to travel to get your new maps. Upload your current map, send it to Ben at Shark and he'll send you your new maps. You also get an immobiliser map that you can load e.g. if you leave your car while on your jollys (nobody can start the car, even if they nick your keys..). Another bonus is you can revert back to original map for servicing or warranty work so the dealer's none the wiser.
If anyone's interested in a shark STS unit and cables pm me as I have one I no longer need.