I don't understand sat-nav use. What did people do before it's invention? I generally look at a map a couple of times and that's it. Once I've been somewhere once, I can remember the way, even on roads I haven't been on since I was a kid. Now I see almost every car on ther road with their sat-nav burning away. I imagine most of these people are on their way home from work (or vice versa). Do these people not know the way home from work? Surely they don't need the sat-nav on!!
I had a client call me once in a right strop as she'd missed (she blamed the sat-nav) the required junction and had made it into central London, she was really pissed off that I couldn't give her accurate directions. On another occassion a courier called me and said that his sat-nav had taken him to a dead end and could I give him directions. When I asked him where he was, he just kept saying "I don't know, just some dead end". Now I'm fairly good on giving people directions, but this guy couldn't understand why I couldn't help him!!!