I have been thru several Garmin Nuvi models (Thanks TSA/Baggage handlers), and have had zero complaints but one...
They seem to disappear from checked luggage.

We now have two that see almost constant use with no complaints. Just don't damage the power cords. Even though they are Mini-USB, they are proprietary, a pain to replace, and expensive for nothing more than a re-wired Mini-USB.


Oh yeah, I almost forgot...
They are now miles better than the junk handed out by the rental car companies, so do not use rental car trash as a standard of measurement.