Product review (5 stars): Great Liners
I bought my first box of liners 2 years ago. I have an electric oven and I cut the liners to fit the floor of my top and bottom ovens.  Spills fell and baked on the liners.  I cleaned them off and reused.  After 2 years I decided to get a new set even though the old ones were still usable.  I use my ovens at least 3 to 4 days a week and this has been a very good buy for me.