I have the Garmin Dezl 760LMT and it's ok if in "car" mode but if you are in RV or Truck mode, forget it. On my last camping trip, it wanted me to travel 45 minutes past my exit, going way out of my way because it had no idea if there were low bridges etc. on the State Highways I needed to go on. It likes Interstates and that's about all it likes. If campgrounds or Tractor Trailer Distribution centers were on the shoulders of the Interstates, It would be great but I've never seen them there. I wish Google Maps had a Low Bridge or tight navigation option for us RVers to use.