I would rate this product with zero stars if the site would allow it. I recently placed a Cookina guard in each of my brand new wall ovens and within one week they had melted to the bottom of my ovens and permanently damaged the enamel on both of them. The company care was not sympathetic and offered to send me a replacement Cookina guard as compensation. I would never recommend this product, but if you choose to buy it anyway, use extreme caution! It cost me a brand new $3000 double wall over to give it a try. Terrible experience.
Bottom Line: No, I would not recommend this to a friend