We used S&T and Street Atlas software as long as we could mainly SA at the end. The software apps were causing us to get off-route at least once or twice a day. And finding a place to turn around when you are pulling a 30 ft trailer isn't that simple. I estimate they were costing us at least 30 to 45 minutes a day.
I did an extensive search for a replacement. There are none to be found for real time navigation in my opinion. Google maps just does not fill the need. I use RV Trip Wizard for trip planning and it is very capable but it's real time mode is primitive. So I finally broke down and bout an expensive Garmin RV890. The software apps were causing us to get off-route at least once or twice a day. And sending use down inappropriate streets in towns.
For real time nav the 890 is very good with a few glitches in our 4500 miles of use so far. For trip planning it mostly stinks. Thus RVTW which cannot be beat. So the replacement is much more expensive, I got the 890 for $390 and RVTW is $40/yr but my blood pressure has been cut by a fair amount. The Garmin has a lot of other features, it tells you the speed limit, it warns of curves and grades ahead, tells you what the next cross street is and a lot more.