I am really impressed with the engineering and quality construction that went into this rack system. I have it mounted behind my Ram Promaster 3500 with a TopShelf, and a GearLocker on the SwingBase and a DoubleUp on the TopShelf. Because of the way the SwingBase swings out and the TopShelf pivots, not only can I easily open the rear door of the van, but I can also access the GearLocker. Everything about this system has been very well thought out. Even though the EXO system could be considered a bit pricey, once you see the quality of construction and ease of use, you will not even care and realize it was money well spent.