In theory it saves a lot of space but functionality wise it's annoying and tools occasionally drop when the toolbox is being pushed around the shop. Especially when hitting that small rock on your caster "cussing" tools dropping, box is stuck. At the end of the day you'd rather want to put tools on a shelf like style tool box, more faster and efficient. "Time is money". Example a tool cabinet locker, or bulk side cabinet. My coworker has it he says it can only do so much. He says he only hangs prybars and hammers on them and it drops from time to time. You'd rather have screwdrivers and wrenches in drawers that pull out. The shelf style side locker, bulk side cabinet, and or powercab all these pull out horizontally and are way more functional. Especially for tools with cases and larger items. You open the box and you can "see" what you need

IMHO the snap on powercab is one of the greatest space savers and has great functionality! always keep it simple stupid, user friendly. Nothing beats what veterans say. "If it doesn't make sense it doesn't make dollars". My 2 cent