Rand McNally Tripmaker RVND 7710 and 7720

I have the 7710. I was leaning toward changing to the the Garmin RV unit until recently. Just came off a 8500 mile trip and I was very impressed with the RM's features. The more I use it the more I like it. I did have a problem with the power connector, it had to be wiggled into a certain position or it would not work. RM made me a deal to upgrade to a 7720 at a reduced price so I am doing so. Goodbye Garmin, hello RM.