There are so many EXPENSIVE cookie sheet liners out there. I decided to test this one at a low cost before investing in something better, and I'm glad I did. There's no denying that this does the job. It holds up to high heat, and food just won't stick! Cookies slide right off, and anything that gets stuck will wash right off with ease.That said, it's flimsy. In an annoying way. It doesn't roll very well, and no one wants a creased liner. Basically what we have here is reusable parchment paper. Of course, given that a roll of parchment paper will cost about what this liner costs, it's a good buy to start with. But me? I'm looking to upgrade.