I guess I underestimated the thickness of my carpet because the chair leaves divots so it is NOT easy to roll. I do like the size, it fits perfectly in the odd shape I have to deal with. I need to order one made of glass.
This particular mat is supposed to handle 200+ but I am going to have to take it back before it breaks. It seems very thin for that weight, and it feels like the chair feet will break through just like the previous mat. The last one lasted a long time. I and the chair are not that much over 200