When I'm not cyclotouring, I live in a VW bus. And I'm a picky old bastard, not easily impressed, but Ortlieb did it again.
On tour, these cubes replaced an assortment of ill-fitting stuff sacks. Perfect fit means I can pack more in the same space, or pack the same stuff smaller. I tried two sets, then got four. It is easier than ever to find stuff, even in the dark. I wish I had these sooner than I did. My tent fits in one, my sleeping bag in another, and so on through the kitchen, toiletries, spares, rain gear, office, etc.
Back home in the VW, the cubes have revolutionized my organization. I have other cubes, made for suitcase travel, but they don't compare in quality or design. These stack nicely and are the right size for my merino tops and bottoms, socks, sweaters, shells, you name it. Again, I can find black clothing items in the dark.
12 similar-looking Ortlieb cubes COULD make finding stuff harder. I keep a representative item in the net pocket, identifying the contents (by feel if necessary) and sometimes offering a quick grab. I don't baby any of my gear, and these nearly weightless items look brand new after lots of use. If they were lost or stolen, I would immediately replace them.