Of all the vehicles our company has used, our favorite is a GM van with the Grumman box on the back end...two passengers up front, suprising amount of equipment and tools in the box. Relatively low load deck, holds up to a 65" tv in box with an average A/V system and all our tools, parts, & ladders at the same time. Only downside is poor gas mileage, but we charge for drive time at our base labor rate, so we come out okay. The roll up door has not been any trouble. We attached sheets of 3/4" plywood to the box's interior sidewall rails; this provides a great place to mount parts bins, hang cables & ladders, etc.. We back it up to our building's parking lot wall at night; very secure (unless someone really dedicated pulled a canopener on the top). The side walls of the box provide billboard space. Happy hunting!