Product review (5 stars): Love this product!
So far we have only used one of these liners (in the oven) so I will update once we try in the microwave and on the grill.

The oven liner is AMAZING! Our oven is older, and when food stuffs fall through the slats, the fire alarm goes off from the smoke. This liner prevents that from happening! If Pizza cheese slips through the slats, the liner catches it! The liner fits perfectly in the oven, but can be cut to fit if you have a smaller oven. We will cut for the microwave, but use the full sheet for the grill.

As soon as we open the grill for the season, I will update the review. This has become my new favorite gift for friends - it's reasonably priced and saves so much headache in cleanup, and it's BPA-free!

They come in a foil-sized container so the extras store nicely.