I've had these for a couple of months now and have used one a few times. I do a wide variety of sewing from crafts to quilting to garments. I have found this product to be particularly useful when using "iron on" products such as fusible interfacing or patches. I place this product under or over the item I am ironing and any sticky adhesive that spills past the fabric stays off of my iron and my ironing board. Once cooled a bit, all of the mess just brushes off of these sheets. This product is not as flexible as using a cotton pressing cloth, but that generally is not a problem as most of what I'm pressing is flat. Each sheet is reusable and will last a very, very long time.