I have a Rand McNally 7720. I previously had two different 7710 and they were junk. Also have a Garmin and it is ok for the car.
My old faithful is DeLORME that I have loaded into my 11" laptop and mounted in driver cockpit. Never fails and have used it with upgrades for many years. Currently have 2014 update. I will continue to depend upon it.
When comparing DeLORME, with Rand McNally, Garmin and Magellan I find the later ones to be more conversation pieces, I own them all