I too have a Rand RV GPS. I love it's size, it's RV specific user functions like finding campgrounds truck stops etc. I hate it's route choosing software. I use it constantly on familiar roads and it is always taking unwise choices. When hauling my RV I run the Rand for finding RV friendly locations but I run a garmin too for directions.
Ohh and the window suction mount for the Rand is awesome. Put it on about a year ago and it hasn't fallen off yet. My little garmin window mount falls off all the time