Barryrv wrote:
... I probably will go with the Good Sam 7" RVND 7735-LM GPS rather than using a Google map ...
It's not a Google Map, it's Google Maps which is an app that comes with Android phones. Since Google Maps constantly updates its map info as you drive, its map data is about as current as you could possibly get. As mentioned, it also incorporates WAZE technology which provides up-to-date traffic info.
I've been using Android phones exclusively for my GPS for about 5-6 years now and would not want to go back to using either a laptop or a stand alone GPS.