I haven't found anything that works as good for me and I tried every item mentioned as works as good. I had to tape the alternatives down very firmly so it wouldn't move. I spent half the amount of the cost of one trying out different just as good things. LOL. The Slider stays in place and a rinse under the faucet makes it as good as new. I've had mine for many years so the cost has averaged out to a couple dollars a year to own. Do I need it? No, but it works great and has kept my sewing extension table looking like new, no scratches.