I wish they could make this product a little more rugged. I weigh 130 lbs but my chair gets "stuck" in indentations created by the castors and makes it difficult to roll my chair. I have to buy a new chair mat every few months as it starts cracking really bad. It has "grippers" to keep it in place on the carpet but it still manages to slowly slide out of place.
The mat travels on its own. I have to move it back to the correct position 10 times a day. I didn't realize this mat did not have the little plastic nubs that dig into the carpet to keep it in the same place. I do not like it at all.