Trap, ... I have the Dezl 560 and find it to be a good GPS. And yes, it can be set for Auto, Truck, or RV. In RV mode you set size and weight for routing adjustments needed for the RV.
The one thing I usually do is add whatever destination I have using the POI loader and simply route to it through my Favorites.
I've replaced it with the RV760 witch has a bigger screen and now use the 560 in my car. I'm sure the time will come where the 560 might mislead me, but to date (2 years) it has never sent me on a scenic tour, it's always been right on.
2008 HR Endeavor PDQ - Ford Edge 4 Down
FMCA F374292