Was in Lowes on an unrelated mission and ran across this product. Claims to be a safe for wood stoves and inserts but is made from recycled wax cardboard. Figured if they were no good for the insert I'd use them for fire pits. Added a single log to mostly coals about 25 minutes ago. It took off like a rocket. It is putting out great heat. Will be interested to see how long it lasts.Has anyone experimented with this product?