The past few batches of cookies I've made on these pans just didn't turn out well at all. There's definitely no problem with burning, but they just don't cook the cookies right - they'll be nice and brown all over, but when I take them out, they just flatten into a very ugly cookie, like the insides aren't cooked well or something. And my cookies stick, even when the recipe says to use an ungreased pan. I'm going to look into a different kind of pan.