Smaller than I expected have about 1 foot of rolling space front to rear under my executive chair. There is about 3.5 inches on the left and right if the chair is centered. It is plenty adequate since I don't roll around too much just have to be mindful about rolling away from the desk. Quality-wise I don't see any cons. Protects the wood floors from my chair's casters.
Not too big not too small it really does have a nice feel to it and is stiff enough for easy rolling without being hard or brittle. Just what I was looking for.
My last computer chair pad cracked beneath the rollers. It was too thin for the berber plush rug. This pad is very sturdy. Hopefully it will hold up well.
I have this on laminate wood floors and it works great! No sliding or moving. I placed something heavy on the corners as it was unrolled and after a day or so it lays perfectly flat on its own.