I've had problems with the tape so just went back to zig zagging, which works fine. Piecing batting works great as long as you sew the pieces together, as with machine zig zag or whipstitch by hand. I received a doll quilt in a swap and she must have just laid two pieces of batting side by side, thinking the quilting would be enough to hold them in place. It wasn't... after the first washing, the batting seperated. Be sure you SEW your batting together, one way or another.