Review on Garmin dezl 580 LMT-S Truck GPS Navigator: 5-inch Display, Lifetime Map Updates, Live Traffic & Weather - Enhancing Product Visibility by Marvin Breezy

Most of the functions are great, the display is great, everything is fine except the main body, down to the suction cup. Garmin navigation is terrible. Even if you use the shortest path, you usually get a longer path. In truck mode, even if the vehicle size is entered, you will see many dead ends, non-existent roads, etc. etc. Google Maps is much better and no separate device purchase is required. This may only be the case in Maine and New Hampshire, so I don't know how it is in other states.