No longer useful
Used to be an OK app as it can display different maps, particularly traffic data from different map providers. Now they require "premium membership" to display traffic, and pops up a reminder every time I start/restart the app. So I stopped using it. Plenty of good free map/traffic/routing apps.
I agree that the learning curve is steep, and the UI is not intuitive enough.
Sillyvalley about
PD Maps Worldwide Edition, v3.10