Well, my son can be a tad special at times, and yesterday was a classic example. His navigation skills are sadly lacking, and no amount of technology can help him.
He did in fact have two GPS enabled iPads in the car, and a iPhone, with a passenger that not only could use the iPad mapping stuff, but also, supposedly, knew the way.
However, we just knew to sit there is costa in Harlow and check on latitude and see that he had whizzed round the M25, missing the M4, the A30 and M3 exits, any of which would have worked, and was half way to Addlestone.
Apparently the phone calls were not appreciated, as my daughter (who was following him) had already called and suggested that maybe he should have turned off the motorway by now.
Hopefully he'll grow out of it - I was almost as bad when I was young, cycling to Evesham when I was trying to get to Malvern. But that was in the days before GPS and mobile phones so I have some excuse :-)