I just bought these rulers at the Hampton VA quilt show and have to say I am already in love. They are fabulous! I cut for about an hour yesterday with no cramping or pain in my hands at all. Today as I squared up a finished quilt when you want everything perfect, it was. Most times rulers will slip and move right as you put your rotary cutter to the fabric, not today it held straight and true. Thank you, thank you! These are the best rulers I’ve ever used.