@better yet

Maps are all well and good, but the only way to update them is to buy a new one. As a regular driver on the continent I depend on my Tom Tom to get me there and to cope with me not following the directions and getting lost. How would a map help me in that situation? A map can't tell you where you are; you need to know that.

And I'm not a complete numpty - I used to be in the forces so I am familiar with map reading and navigating (probably to a greater extent than most un-trained civilians).