There is definately a bit of a learning curve when using the GPS.
Garmin mapsource is not the friendliest app to learn. The Zumo sometimes will recalculate the route when it is transferred from the computer and it will be different than what it was on the computer. It takes some time to learn how to compose the routes so that those changes are minimized.
The Zumo talks to you so reading is not needed very often. But it is readable when necessary. I can see it much better than I can see a map in my Tank bag, so now i can be more protective of that paint on my Tank. no more Tank bag for me!!
It has tried to route me down a one way street on two occasions, of course those do change and the most up to date map data is at least 6 months old.
On the computer (Mapsource) kept wanting to route me down the Apalacian Trail when I was doing some pre planning for that weekend. Also there is not very good knowledge of where the roads are unpaved. I am keeping a list of things to send to Garmin support.
On the other hand, I just need to get one of those KTM Adventure 690 or 640, then I would be able to go anywhere it wants me to go...
Looks like I will be heading to the Vintage days at Barber, the Boss said it's OK with her. But I will be bikeless, hopefully that won't be a big deal.