We've been using Garmin's RV760LMT ever since they came out. With a fiver measuring 13' 6", it's saved us more than a few times from going down side roads or city streets with bridge clearances less than that. Most recent was just last week in the Wisconsin Dells. Garmin had us routed to the campground by way of an exit beyond the one closest to the campground. While at first we thought it was a mistake on Garmin's part, it turned out that there was a railroad bridge with 12'2" clearance on the road from that exit. Saved us from having to turn around, or worse, not noticed and done some serious damage to our rig.