I bought a cheap one years ago for sewing pre-packaged bias binding on things such as potholders, etc. It was supposed to sew all layers at one time, but I found it impossible to do a neat job ... stuff was slipping and sliding every which way; I assume doing a one-step quilt binding would be a real "Mission Impossible". I saw a professional quilter on t.v. several years ago who had a large, sophisticated and expensive piece of equipment for that, but it was not an item for the average home quilter.