It has been more accurate than other truck gps. Others have had me turn on restricted roads where I was too heavy, and I had too many axles. This app had me avoid this road and go around to a different route. It would be a perfect app for me if I could avoid Tunnels! I haul hazardous materials, and I can't go in tunnels. I hope developers read this and add this feature. It makes me go to another app. I would give it five stars if it had this feature. 😉