I saw a beautiful store sample quilt where they had Wonder Undered batik motifs onto a background. They had machine meandered over the top. There were no stitching down of the batik pieces in any manner. It looked beautiful but with the first wash they will have loose edges. Perhaps they don't intend to wash it? Seems a shame to create something that nice and not doing some edge stitching, either 1/8 straight stitching on the pieces, buttonhole stitch the edge or satin stitch. To each their own I guess.