The concept of having two separate voices issuing from the GPS units providing conflicting directions, and arguing between themselves, does raise this thread to a higher level (not above BS however). Of course the ultimate sound clips from Maine would be "You can't git thar from here!" followed by "Don'cha move a gol'darned inch!"
Evidently there are 59 sound clips needed to provide all the navigational instructions from any one person. That is pretty demanding, and might limit participation from some of us who really never get the lyrics to songs sorted out.
It won't be long, I expect, before a voice breaks in while you're cruising along, pointing out the advantages of stopping at Burger-Death, McFuneral, or some other special place of interest. Yes, I realize one can already search for such places as one travels but so far we decide whether to initiate the search.