I typically machine sew all my bindings down. I started out machine stitching until I was comfortable enough to do it by hand, but after sitting for nearly five hours stitching a huge quilt on a time crunch I machine bind. I haven't made any show quilts or anything that would need perfection. Also, after the quilt is quilted I usually let is sit for a few weeks before I want to consider cutting and sewing binding. After I sew the binding to the back, my quilt sits until I want to devote a few hours to machine stitching it down. I just try to stay on the stitching that holds the other side of the bind down.