Product review (4 stars): Do what there suppose to do.
When I first saw them I thought this doesn't look like it will work.  Wife cut them and put them on grill. They work exactly as stated.  Don't know how long they'll last, but for the price doesn't have to be long.  I can hardly tell they are under the burners since I have a black enamel stove.  Was having a hard time finding any aluminum liners since my burners are so large.
I would recommend someone give them a try, like I said price is very inexpensive.