We have some of these to hold our board games in the second coat closet downstairs, and I think they're fabulous! I would love a few for my second closet in my office.
Shortly after moving in, we put full shelves in one of the office closets, but never got around to the other one. Now that I'm used to storing some bigger drawers and things in the other closet, I'd love to store a bit from the top down and use these. They even hook onto each other, so you can double them up.
They'd work great for some of my crafting stuff that's in small-ish boxes, or even with bins that would fit on them for other miscellaneous stuff.