Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: They stain and don't clean easily.
Review: I use this with non-stick cookie sheets and they really are not necessary. I roasted some vegetables on it and it left a dark stain that I could not wash out. It is hard to clean because it tends to roll up. I roasted some nuts and they tended to stick to the surface when I tried to shake the pan to even out the nuts. I don't make cookies, so I don't know how the liner would react, but I think many spatulas would not slide easily due to the rubbery texture.
