I am sorry to inform you but this product cracked the first day day I Used it. I will be returning it back to the store. But presently we are all in lockdown due to Coronavirus.
I use this mat over carpet and under my castered chair in my home office…daily use but intermittent. I recommend it for residential lightweight use; not for office daily use.
Bought this mat with a new chair (which I love!) and found it to “dimple” under the chair wheels making it hard to roll. Thicker plastic would help it keep a flat shape.