Product review (2 stars): Brand new oven stained.
I have a brand new oven and thought this sounded like a great idea.  The 2 that are on the shelves appear to be fine and working well which is why I gave it 2 stars.  However, the 1 I placed on the bottom of my electric oven started smoking horribly and literally burned the bottom of my oven.  The sheet actually fell apart upon removing from oven.  The stain I have not yet been able to remove.  So DO NOT PLACE ON OVEN BOTTOM.  Oh btw, temp was only 400 degrees in oven.