Another aspect of great looking corners is to sure they are absolutely square before you start to apply the binding. It is very easy for them to be a little bit off because the quilting in the borders either goes through to the edge or stops short of it-depending on your pattern. I square the corners with a 12 inch square ruler. At the same time I usually work my way around the quilt to be sure the edges are straight and even before putting the binding on. I usually make my bindings the width of the outside flange of my walking foot-I always use my walking foot to add the binding.