Edit - Added photos of a home made bracket for the Garmin in order to mount in my F150.I owned an older Garmin unit for a few years (before it was liberated through the freshly broken window of my car) and I liked the way it worked as back then cell phone navigation was in its infancy. This unit was purchased for the sole purpose of navigation with a 30' conventional trailer. I like the magnetic base which has not dropped the unit over its initial 500 mile trip. It is easy for the passenger to grab the unit off of this base and look up or adjust routes as needed. And, it is convenient when leaving the vehicle for short periods of time. I have enjoyed all the extra features so far. The connection to my phones Bluetooth for traffic and weather are great.The unit APPEARS to properly route me away from unknown roads and low bridges. It does warn about roads that it does not know are of capacity for your tow vehicle (once you are on them) So, it does supply a level of comfort to reduce driving stress. However, I am still verifying my route with the $10 road atlas from FlyingJ before heading out.It also has a tendency to keep you on large highways to and from your destination. Therefore, the route shaping feature is mandatory if you dislike this guidance style. I prefer the old state routes at times, especially when they are the most straight route to my destination. The unit also has a tendency to go straight through big cities of there is an interstate available. I prefer to go around to avoid the snark of gridlock and never ending lane changes in heavy traffic. The route shaping feature does lock up at 80-90% completion at times and it appears to be possibly caused when one selects a road that your rig size would conflict with. However, simply cancelling our of the calculation and starting over seems to work well.This unit does however do a few things that are very anoying. The unit will try to guess your location while you are typing it into the address section. But it does not allow easy entry for the state your are wanting to search. From Ohio, it defaults to Ohio, Indiana and Pennsylvania. One has to jump through hoops to get the unit to consider Michigan or Kentucky. Finding specific small campgrounds is cumbersome as they just are not always considered by the unit in the first or second go around. Even with a fresh map update, the unit could not identify Indian Springs Camp Ground in Indiana. Direct address entry did not work, and like my old Garmin, it is fussy about the naming of county roads, road vs rd, etc. Even locating it in the map was of no use as it just didn't want to accept this location. We instead, selected the gravel quarry close by and eyeballed the last little bit. Once we were there, the unit would find the camp again. At one time, the unit mislocated the camp to an open field 20 minutes away based on its campground database.Upon arrival and connection via Wi-Fi to my home internet, after a few short downloads it said it was up to date. YOU MUST SPECIFICALLY PLUG THIS UNIT INTO A USB CORD TO DOWNLOAD THE MAPS AFTER FULLY CHARGING THE UNIT. NO MATTER WHAT THE INSTRUCTIONS SAY. No matter how hard I tried, the unit would not down load the maps over wifi. And, as with most products, this initial map update takes hours. It is not ready to go out of the box. Map downloads seem old as well. We covered roads that appeared to be changed (roundabouts and such) for some time yet they are not in the updates. ISo, 4 stars is the best I can do with star #4 being mostly for the reassurance of pulling the trailer with less worry about route capacity for my rig.