Just remember not to use any sharp utensils on them, such as cutting your meat, pizzas, etc, because it would likely damage the mats. Other than that, I see no reason not to use these on a regular basis. It sure beats wasting aluminum foil for lining pans or catching drips. Grilling tests will likely be performed at some point in the future, but for now I am giving these 5 stars because I really enjoy cooking with them.
Although I got this product at a discount or received a complimentary sample in exchange for my honest review, all thoughts and opinions on the products I review are always my own and have not been influenced by any discounts or samples which may have been provided to me.