I have used it twice on large projects. It was important to get started correctly-squared- so that it did not go off in the wrong direction. Then, as soon as I was finished fusing it I did STID to anchor each of the blocks and borders. I also stitched with a long basting stitch the perimeter of my quilts. It worked fine for me. It is a bit fragile but anchoring it is the key. I like it. I do use the fusible in small projects and am careful to anchor the blocks with STID.