I used two of these over our electric stove in a tiny kitchen.  It provided additional (temporary) counter space while putting groceries away, and anytime not using the oven.  While they could be used as a cutting board, they would mark more easily than a good cutting board.  One does need to remember to remove them while using the oven, but never was an issue due to their size.  Nevertheless that is the one caution if you have anyone who tends to cook before they think.