I have 2, 24"x36" DeSerres about 3 years old. Excellent results. Not glued down so I can turn and flip them to give a longer or shorter length. DeSerres claim this series helps to keep your blade sharper, longer. I might believe that based on some other mats I've used. Also, I do not get much 'skitter' on these - some others allowed my work to slide a bit while cutting.