I had one border on the quilt top I am working on now that I pieced. All my blocks were done except the last one as I was short one of the fabrics. It was a mottled burgundy fabric and I pieced it together. The seam is almost invisible and I am going to make sure I put a quilting line through the join to further disguise it. Unless your quilt is going to be judged, I would piece it. Some judges frown on a piece fabric, some not.