I've always used the Garmins and never had a problem. I got a Rand McNally RV model and I'm not too fond of it. When you try to type in an address to go to, it helps you type it by eliminating some of the letters and I've had several times where I couldn't enter an address because it didn't recognize the correct address. I've also planned routes and in the middle of the route it tells me that there is no "legal" route to get to my destination. Also after programming my coach info it has taken me on some small curvy mountain roads. My coach came with the Rand McNally and I've had the same issues. It may be me, but I really like the Garmin. Good luck
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