The nice thing about the drawer/try type setup (and why I'll move to it someday if I have a new shop to outfit) is that it accommodates the fact that the Systainer's have tops that open. A full extension drawer/tray lets you pull it out, open the container, acces what you need to, etc., without physically moving the container to a different location/surface. Right now, most of mine are stacked two high on the shelves and Murphy's Law dictates that it will always be the one on the bottom that needs to be accessed. Drawers/trays are convenient and the containers will likely stay cleaner than they do sitting on open shelves. Looks orderly, too.