I drive for a local LTL freight delivery co in upstate NY. We have a straight truck with lift gate. In the winter it is very difficult to operate, snow, ice, slush, sand, and road salt gets packed in the gate. It adds alot of wt to the back of your truck, 1000# possibly. You must bust out the stuff with a metal bar. After a few years old it becomes a high maint item, welding and repairs to the electro-hydraulic unit. The gate goes down on its own and uses hydo power to lift. Several times the gate went down but would not go up, this is not good when you are double parked on city street making a delivery. Beyond this you must contend with freight elevators or stairs to service the customer, it can be back breaking work. I am paid by the hour but if you are paid by the mile be sure you consider what you might encounter at the drop point.