We've never used an oven liner - not sure why, but it seems a little dangerous or unreliable. But perhaps that is wrong. We are a little unsure of using Teflon; is it safe? We also don't like using something disposable - like foil. We've heard good things about silicone liners, but we wonder if they can be used even when we crank our oven up to 600°F for pizza.
Here are a few oven liner options we've found. Do you use one? If so, which one?
Related: How To Broil a Steak In the Oven