Other than the handheld Delorme PN-60 handheld for hiking/geocaching, etc, we picked up a Garmin car GPS a couple years back. First order of business: MUTE.
It's good to see the distance traveled & distance/time to destination if we choose one. It's also nice in urban areas off the freeways where we've never been to, and when we are trying to get to an urban/suburban location.
However, it is a guide, nothing more. It is not the end all, and paper maps are always our constant companion. We have Delorme map books for the entire western US; our Oregon copy was so well used we replaced it.