I love the sat nav!! Not only can I not get lost, but its far easier to change settings of the car, and control the radio/ipod features, and the tunes are displayed on the screen.
The nav gives you traffic info, so you can check main roads around the area, and it also gives you the option to amend the route if there are traffic problems on it
A couple of shots of mine -
Oooh shes well trained then, good stuff

I do like the Climate control (which you have to have with sat nav by the way

) its quite clever how it works, well i think so anyway
The only thing I wish I had specced now is the Bluetooth, but hopefully that will be sorted in the next few months
