Originally I ordered a mat that was not only too small but way too thin. I was extremely pleased when this new purchase was exactly what I needed. Plus it was delivered flat so I didn’t have to go through the period of waiting for it to uncurl.
The material of this mat is not completely rigid so my office chair wheels make dents in it that I notice when I slide my chair back and forth. That being said I don't move around much while working and I mainly bought it to protect the carpet so it is fine for my purposes and the price is reasonable.