Genghis - it's absolutely reasonable to demand stringent standards for something that cannot be your primary navigation system.
The 2x GPS in my cab are both running out of date maps. Similar position in my earlier 2 rides. By about 4 updates on average. Not actually found a problem yet. However, one day when they re-route the heli lanes or move EGKR 35 miles South of current location I will definitely need to update