Works like magic for cutting strips, as long as I'm careful in getting both folds aligned. Align folded edge of fabric with line close to me on cutting mat. Then carefully lift selvages and bring toward me to create second fold, aligning with cutting mat line. With Shape Cut upside down, align "top" line of Shape Cut with fabric fold nearest to me. Starting at the right side at 0, I spread my hand flat to keep the Shape Cut in place, cutting and moving my hand across with my index finger "near" the next slot to cut. If you start at the left and cut toward the right, the fabric fold has a tendency to creep out of alignment, which is no different than regular rotary cut rulers. The Shape Cut just lets you cut more at a time without moving the ruler, and they're all the same size!