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.
The description for this mat says that it "Protects carpets up to-3/4-inch thick including padding" however I used this on carpet that was barely 1/2" thick and the wheels of my computer chair would keep sinking into dents in the carpet caused by how thin the material is. The mat provides basically no support for chairs on carpet.On top of all that when I received the mat it was absolutely filthy and the adhesive on the tape that was used to hold it together during shipping stuck to the mat.
I must say I really enjoyed shopping at Staples....I had never been there before....The salesmen were very polite in helping me....Also answered all my questions....I'm hearing impaired and the salesmen was very understanding of me.I'm very happy with my purchase of my chair mat.Thank you!