Product review (5 stars): Best purchase I've made in a long time
I was so sick of lining one of my shelves with either aluminum foil or a baking sheet pan to avoid the spills on the bottom of the oven.  I do have a self cleaning oven but I hate using it since it smells up the house and still leaves you with cleaning up ashes.  This really does the trick.  The first time I removed it to clean it I figured it was ruined.  Baked on stuff wiped right off.  What a time saver this thing is.  I also bought one for my toaster oven.  Best purchases I've made in a very long time.  Highly recommend!