one thing I did NOT like on the Microsoft Streets and Trips software : When you are zoomed in at max and see the unpaved dirt roads, as soon as you zoom out a bit to see a slightly larger view and to get an idea of your next left dirtroad options those dirtroads disappear and you only see the paved roads. Compared to Google Maps, you can zoom out several times ( 8 increments ) in Google maps and the network of dirtroads remains still visible , which is of great help when you follow a storm and you want to plan beyond your next move.... as much as possible, as long as I had mobile web access, I preferred to use Google maps rather than Microsoft Streets and Trips. Especially in chase mode.
on the Campo tornado day, May 31 last year, we were driving on dirt roads west of Campo to get near the storm base, long before the big tornado formed. We were following Microsoft Streets and Trips, and according to the Microsoft map our dirt road was supposed to go east all the way to the paved road, but it did not, there was a map mistake. Google maps however shows the dirt road there correctly.