I thought it would be a solid piece of plastic. Instead it was a roll of vinyl. The website description did not say that. Basically it's OK. It's not worth the money that they charged. It was about $33.00.
My previous chair mat had cracked so badly that pieces were about to break out of it. I received this one and rolled it out into place. I had to place some weighty objects on the edges to help flatten it out but it works fine. I does slip a little and I have to readjust it slightly from time to time but my chair rolls well on it. I have no complaints.