That way your head will be up looking at the scenery and road signs rather than concentrating on a small screen all the time.
I'm sorry Noddy but I've got to disagree on that one.
If I plan a route I produce a route plan from maps. I do this because I find using maps on the move just about impossible.
The route plan goes on top of my tank bag. When I refer to my plan I'm not looking at the road. I've nearly come unstuck several times with this flawed strategy.
Sometimes my plan isn't good enough and doesn't help me with the reality of the road laid out before me, causing me to stop (normally after getting lost) and swear and remove gloves and get the map out after trying to sort out where I am from the plan. It's normally either pissing down or 28 degrees in the shade at this time too.
GPS on the other hand is in my line of sight. Approaching a juction my chick tells me exactly where to go while my GPS shows just the junction involved enlarged to fill the screen with a purple route illuminating the way to go.
There is IMHO no comparison.
I like maps, I enjoy navigating the fells although I do carry a hand held GPS just in case.
On the road, when it's working it's a breeze. It's a computer however and it won't always do what's obvious to us humans. It a grand tool to be used in conjunction with your head.
Peter