I Love VZ Navigator
I don't have a GPS unit in my car, but I do have VZ Navigator, namely for the aforementioned reasons, as well as the fact that I'm the absolute worst person for getting lost and whatnot. Despite it having me take a drastically different route that was so far outside of my original route, it managed to get me home only ten minutes later than intended.
Yes, I realize that this ...
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The husband was the only one who knew how to get were we were going. He's deaf, and doesn't read lips. I'm driving with the three of us crammed in the cab of the U-Haul and he's giving me gestures as to where to turn and such to find the place we're going. We get about 3 blocks from our destination on some little city side-road where none of us have ever been and there is a freight train at a DEAD STOP...
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I think tower triangulation is more efficient than satellites, assuming you have coverage of course! satellite based GPS is good when you are in the boonies.
http://www.gpsmagazine.com/2008/08/verizon_vz_naviga ... »
http://www.gpsmagazine.com/reviews.php »
Surprisingly, the user interface and control for VZ Navigator is extremely simple, especially with a QWERTY keyboard. Those key factors, in my opinion, beat out the dedicated GPS units.