Had the mat for 10 days and seems to work fine. Chair wheels do sink in slightly if you sit in one spot too long not a real issue for me. Seems like a good bang for the buck about half the price of the thicker ones. If you don’t have high pile rugs I definitely recommend!
I have a very small office in my house. Carpet made moving the chair difficult. Bought the smaller chair mat which took care of the problem. Price is reasonable too.
A good heavy-duty carpet protector must have enough rigidity to keep the weight off the carpet below. This is a lightweight piece of plastic which will require replacement even with light use.