This is an attractive product and certainly not the least expensive. The thickness and hardness are severely lacking as the chair wheels dig into the surface as well as create potholes that are difficult to get out of. I am constantly realigning it as it slips all over the carpet. Not recommended at all over carpet.
Size fits perfectly in my small office area. Price was reasonable. I think my carpet is a little too thick though because over time I get "stuck" in dents the chair wheels leave.
I have a home office and use it under my chair. THis type of product had a "lifetime" guarantee not any more. WIthin 9-12 months or less I require a new mat. So much for lifetime..