Eighty percent of the time this unit is better than most truck GPS units. But it is the other twenty percent that leaves me disappointed. Exit numbers that have been changed for over a decade, IE. Mass Turnpike, are not updated. Bridge limits that have been changed for decades, IE, PA State Route 35, have not been updated. This unit is very slow to reroute to an alternate faster route and prefers to make you back trach to use the initial route rather than make a change. Brown Road (no trucks), from Martha Drive, Berks County PA, to I-78. Among others.