I had one and ripped it- sewed it to the back of my quilt- I was so mad! Someone told me to get one of those teflon sheets for the oven- 2 of them were about 10.00 on Amazon. Work fantastic! I just cut a hole in the needle area and affix with painter's tape. They work just as well, or in my case, better.
The prices for the Supreme Sliders are ridiculous.