I just don't think offline maps are ready for prime time. I wanted to run the Torque app & have offline maps available for GPS navigation. It looks like it's a no-go. if I toggle out of Torque, I can't go back to it without a new startup. That means taking my attention off the road, or stopping. Ugh. At least Torque never puts the N7 to sleep. Maps does.
If I stay in offline maps, I have to take my attention from driving to move the map to follow my gps icon. And if I don't do that, the N7 goes to sleep. The maximum no-sleep display setting is 30 minutes, so I'm hosed. I guess I'm keeping my GPS navi system, after all.