I like using comic boards for neatness, but I don't think they save space. I think it depends on the depth and height of your shelving. If you can adjust your shelves to just the height of the boards standing up and if your shelves are shallow, you will fully utilize your space. But if your shelves are a few inches taller than the boards, you will have dead air space on top of the boards that you would otherwise use in stacking folded fabrics. Analyze your setup in deciding if the boards will work for you, especially if space is really tight.