I have one - It is the June Tailor "Shape Cut" slotted ruler. Unfortunately, I haven't used it yet. It is one of those things I thought I absolutely had to have, but it scares me. I can cut strips, I can cut triangles, I don't want to cut fringe into fleece, but I do want to do the strips into diamonds and that is why I think I got it, plus JoAnn had a 50% off and I had the coupon. Why do we feel we have to buy something because we have the coupon????? So how it works, I do not know, I don't know if I will ever want to know, but I have it in case I do. Edie