MY OLD CARPET MAT (PLASTIC) GOT HOLES IN AFTER A FEW GOOD YEARS. THE NEW ONE DOES NOT STAY IN PLACE--IT TRAVELS ABOUT 4-6 INCHES EVERY SINGLE DAY AND I HAVE TO PULL IT BACK TO WHERE IT IS SUPPOSED TO STAY. TOO MUCH TROUBLE TO RETURN SO WILL HAVE TO KEEP PULLING IT INTO PLACE EVERY DAY I SET DOWN AT MY COMPUTER. NO FUN !