I have been using both the Garmin RV 760 and the Rand 77xx. Here was my experience on a recent trip from Red Bay, AL, to Carson City, NV, via I-70
We were heading northwest on Hwy 63 to pick up I-70 at Kansas City. Near Gilmore, AR, the 760 wanted me to take I-55 to St Louis, which would have taken me northeast many miles out of my way. The 77xx routed me correctly to stay on Hwy 63 as I had programmed it.
On the other occasion I scheduled a fuel stop at Richfield, UT, on I-70. When I got to the I-15 interchange the 760 directed me to turn northbound to, I assume Hwy 50 at Holden, UT. The 77xx directed me to head southbound to Hwy 21 at Beaver, UT, and ultimately to Hwy 50 as I had routed it, again saving me unnecessary extra miles.
There are times I will schedule more than one possible RV parks along my route, and then make a decision which one I might want to stop at depending if I feel like driving further that day. Deleting a stop on the Rand unit is very simple. Preferences > Skip next stop > Return to map. The Garmin is much more involved, but I can't remember the sequence off the top of my head.
I do my trip planning for the Garmin using Streets & Trips, create a .GPX file which I then import to the RV 760. For the Rand unit I use Good Sam's Trip Planner, which I like much better than S&T. When I'm done with a route, I used the Dock program to transfer it to my 77xx.
2017 Tiffin Phaeton 40QBH
2014 Jeep Cherokee Limited