This came as described but is was just a little too flimsy for us. A heavier person will have their chair wheels sinking into this and making a dent and possibly not rolling smoothly. We are returning this item and ordering something more expensive and sturdier.
Mat is large and works well on my office high pile carpeting. Was expecting longer "spikes" but we'll see how it lasts (previous mats have cracked within a year of moderate - two hours a day - use)