This may replaced a similar item which was 12 years old and broken. Looks fine actually I prefer to think of it as a 36x36 with a lip which goes under a desk or similar.
Like every other mat I've used this one also easily takes the impressions from the wheels on my chair and I need to "coax" it out of those depressions every time I move my chair.
This mat is a replacement mat. I have to buy one about every three to five years since they do finally start to get holes in them. But heck these mats are great to put on the carpet so my chair doesn't sink and can move around.