You do crack me up Watts! Make notes from a map... What with, some chalk and a slate?! 
I normally look at a new journey prior to setting off and stick the car nav on as a guide to help once I get close. The VW system isn't great and sometimes tries to send you on a ridiculous route. Recently tried to send me through a camera controlled bus only zone in Manchester and then a few weeks later told me to go down a one way street, the wrong way. Explains a lot of the idiotic driving you see when the lemmings use their nav for every journey...
Chalk and a slate? Now that is a good idea, enviromentally friendly definitely

Once when we were stuck in traffic on the A31 in the New Forest, the dumbass nav twice wanted me to take a left to avoid the traffic - onto laybys, then twice more it wanted me to turn off onto rough tracks into the forest that even a murderer with a corpse to dispose would've thought twice of taking

Considering how little I use it, there have been far too many of these stupid directions for them to be considered a rare glitch. Technology my arse. Having said that, my co-pilot's iphone directions were spot on when negotiating our way into Lille once to drop off our hire car, god only knows where we would have ended up if we were relying on the VW nav...