Love our Garmin Dezl. Has lots of routing functions for MH. We had a rand McNally unit, hated it. Froze up more than a well digger's belt buckle in the Klondike.
Remember that any device that is not a GPS but being used as a GPS with downloaded apps (Ipad as example) not only cost more, but you also pay for the data. Granted it can be used for other stuff, but GPS' are cheaper and more specified to task with no "extra" cost to run them. Personally I've never found a device that works better at being a GPS than an actual GPS. And Garmin usually tops the list for reliability and usability. Our Iphone is awful trying to navigate with.