Since quilting fabric tends to be 45" wide at the most, half that is less than 24", the length of the standard rulers. Why do they think we need it wider? Using this would mean that your rotary cutter wouldn't have the chance to slip away from the ruler, so that might be an advantage. But I would want to practice with it before purchasing, since I'm not sure the pressure on the blade would be right, or that the depth setting would be easy to select or change. I'd be interested in seeing it at a quilt show.