Works well except that I left it in my trunk for 1.5 days (it gets hot) and one corner of the mat is now bent up and catches feet or chair casters. I'm sure it will eventually ease back flat if not I'll take a hair dryer to soften and flatten it.
My son is using this mat. He states the desk chair does not leave imprints in the mat. We were both plesantly surprised about that. The size is perfect. We have high pile carpet and the mat stays put. Most mats are too small not covering enough area. The mat is so nice I just ordered the same one for my desk chair. Highly recommend this mat. well worth the cost. = )
It isn't quite as heavy duty as my last chair mat which lasted about seven years. I don't expect this one to be as durable. It was a reasonable price though I have to say.