This just seemed like such a good idea I got one as a gift for my friend who taught me to quilt and one for myself. It's an old concept that goes back to the beginning of quilting days, and it would makes sense if only it really worked. The power doesn't make a durable mark. It's messy and the markings dust right off, especially when handling the fabric, which has to be done while doing the quilting. We each only used it once and now it just sits in the drawer. I should toss it keep thinking I'll discover a way to pounce on the chalk and have it actually stay.