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.
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.
This mat fits perfectly under my home office desk and my chair rolls easily on the surface. It stays in place no matter what size person is sitting at the desk. It has a nice finish wipes clean with a damp cloth. I would buy the same again.
The adhesive used to package it will not come off. I have used everything I can think of and I still have a 2 inch strip of sticky adhesive. My chair and my shoes stick to it.
Since I spend several hours every day on the computer I appreciate the ease that I can now move around in my office chair thanks to the great floor mat!