I generally find our GPS helpful, but there are exceptions.

1) getting lost completely. One day we were headed for the central part of a town of about 5000 people. Instead the GPS got us into a trailer park out in the country.

2) In ancient European cities with tiny streets and many one-ways, it simply cannot cope.

3) I have friends who were going to visit cousins in a town with Shore in its name. The GPS tried to drive them into the ocean (where the shore is.)

4) It insists on a complete address. I was dismayed that it cannot take you to a small town of 300 people. NO, it demands to know exactly where in Cottonwood Falls you want to go.

Nonetheless, when you're going somewhere you've never been before, it's a real comfort.