I was skeptical but purchased anyway. I am so glad I did. I trimed down one with ease to fit my cookie sheet. Straight out of the oven the chocolate chip cookies slid right off and a simple dunk in warm soapy water to remove oil spots and a simple wipe and clean as a whistle. I have used them for pizza rolls that always leak gooey cheese that sticks to the pan. The cheese gooed out and got crispy brown but slid right off these remarkable mats. They work so wonderfuly I purchased more as gifts for friends and family. One package has three so I made three seperate gifts and they are a hit with everyone. Since then my friends and family asked where I bought them and of course I said AMAZON, where else? They said they plan to purchase some themselves. Short version; get these delightful inovative bbq mats that work great in oven and on the bbq. Oh did I mention the bbq ribs? Marvelous for those also. So dont hesitate on these because clean up is so easy and they can be used over and over. No more scrubbing and scratching my pans. Yippi!!