The chair mat was fine.....it came folded and I set it out in the sun with weights on the four corners. After about an hour it was flat. I don't know what I would have done if it was not sunny that day!
The only thing I would change would be the thickness of the mat. My old one was thicker and the chair moved easier on it. I was impressed with the salesgirl and delivery of my mat. I would definitely recommend Staples and their service. I would also recommend the chair mat.