A step that I deem important doesn't seem to have been mentioned here. If I use the machine to do the binding I sew it on the back of the quilt. Then I use a ruler to be sure and trim layers even (this is only a small amount, but the layers need to be perfectly even). Then I press the binding and quilt so that it is flat. When I roll it to the front to stitch I know that the back is flat and will not be wavy. Sometimes I use a decorative stitch and use the presser foot recommended by the stitch I choose. I find that the good pressing makes the corner miters really square. I have had good outcomes with machine binding. Just like machine quilting for shows had to come of age I think machine binding will also become acceptable some time in the future.