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