I live in an apartment with new carpeting I have 2 roller chairs which can run havoc on the surface of the carpet. This floor mat is working out so well the transparency is excellent (I've forgotten it's there) my chair rolls easily over the surface and I am confident there is no damage to the rug.
The mat came upright no fold or tube to unfurl. It is clear I can see my wood floor through it. It has absolutely no smell. These were some problems cheaper mats on line have. Very happy with it.