Unfortunately, but not perfect

The mat is simply great. I ordered prior to my new laminate flooring me they scratch to be protected by a swivel chair. It is transparent and you can see the laminate through. Of course, it will be appreciated by the fluted structure on one side, that a mat is on the floor.

It is very stable and about 2 - 3 mm thick. On one side it is serrated so that the chair neatly rolled, the other side is smooth.

So far I can not fault notice to the mat.

UPDATE:
I regret to say that the mat in the border area was poorly finished and has my laminate easily damaged. The smooth underside had bumps that caused by slippage of the mat on the laminate scratch.

I have the mat now replaced by a carpet.

UPDATE 2:
The review was raised again because I was offered a free replacement of the mat and convinced the customer friendliness!