The other nice thing that will appeal to map-lovers like you and me is that you can go on to Google Maps, set out a route that takes you on the roads you want to go on, and you can then convert the route to a GPX file and download it to the SatNav.
I used it yesterday to plot a very quiet B road route to Bicester and back, and it worked very well.
I like the sound of that....
One of the things on my bucket list is to drive to the South of France avoiding the peage - I hope to do it one day, but would definitely need this type of thing.