I have the 7 inch version of the Garmin GPS... the 795. I also use other apps and programs for long distance trip planning and I like being able to import trips planned on other programs into the Garmin. The only issue is I've run into is with the RVLife app. It still does not use traffic information in its route planning. The 795 does and can immediately re-route when roads are jammed and closed. When it reroutes it continues to use the same vehicle restrictions in the new route. RVLife can't do this. It can't take into account potential traffic on a route at a particular time either. The Garmin is better than the RVLife app because Garmin has traffic data. Its better than Google, Waze, and Applemaps because none of them account for vehicle size and weight in route planning.
I don't like the Garmin Drive app. It's not convenient and frequently fails to connect to my phone. My Rand McNally GPS was far easier to connect to my phone. I don't like the interface much. It seems to require more screen jumping and menu diving than any others GPS I've ever owned.