I placed it on the floor and it seemed to be perfect except that it really smelled badly - a toxic smell. I placed it outside for a few days and it curled up into 5 angled object. Some of the smell is gone but it's still kinked. One is in use and the other is still unwinding.
I only weigh 150 lb and I am using a executive chair with 5 rollers. the weight of the chair on the mat causes depressions making it difficult to roll around on the mat.
pretty good price still comes up to [$] which is not cheap !but so far so good chair slides pretty easy not perfect.you can get those cheaper at [...] for like [$] i think.