A destop file/sorter should be sturdy stacked enough to see the file labels clearly and clear clutter off the desk. This one does all that and even looks reasonably nice. It's a great organizing tool.
I use it to store folders for the different subject areas for teaching. I put the vanilla folders in the slots so I can reach them easily when I'm looking for some ideas. I put the folders I use the most into these slots for handy referral.