The adhesive sticker that is on the mat is not able to be removed easily. I put that section under the desk so I didn't have to spend time trying to remove it in its entirety.
We have glued down very thin carpeting in our office and the glue had given away causing ripples in the carpet. I thought the .85 mil might be too flimsy but was pleasantly surprised. These mats are surprising adequate for our use. We've just had them a couple of weeks so only time will tell if they will discolor with age.
It is in our computer room we have a chair with costers on it and works well. I just wish that it was just a little bit heavyer as the chair sits on the mat with-any-one setting in it it leaves very deep impressions it the mat.