This really does create the most perfect binding ever! Sharon Schamber's technique for perfect binding of straight edge quilts. The last few minutes are the best. I do all of my bindings this way and they're awesome every time.
Binding: Open the tails. With right sides together, place one on top of the other at a right angle. Join the strips with a diagonal seam. Before stitching, check to be sure the strips are not twisted. Trim the seam allowance to and finger-press open.