Our rug is actually thicker than that recommended in the product description. Our chair rolls OK not great but OK. We purchased at [$] less a $5 coupon. Others were $49 and up. But I don't think a smoother "roll" justifies the step up price.
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..
On carpet I use it to protect the rug and to make it easier to move my office chair around on it. This mat is so thin that the chair won't move when I'm sitting on it. I got a cheaper but heavier one at another store.