I have used the button sewing feature on my Pfaff to reinforce or replace ties on a couple of quilts. One was a donation quilt that I was supposed to bind but I could see that the ties were not holding and coming untied so used that stitch over the yarn ties. The other quilt was one that I had been asked add a fleece backing to, covering the original denim backing. Used that button stitch to attach the backing after sewing the fleece backing in a "birthing" manner.