I think it depends on the what you are doing with the fabric. I come from a garment making background and straight grain is very important. It's not as important in quilting. Once the piece is quilted its not going to move much. Sometimes I've "fudged" it a bit when I have an obvious print that needs to be straight on the piece, but I you are going to cut it into small pieces to use in a quilt, it probably won't matter.