We purchased this chair mat to protect a low pile Oriental rug in our home office. The rug was wearing out under our rolling desk chair. The mat seems to be doing the job. It is a sturdy but flexible mat with small "grippers" that keep it in place. The chair rolls easier than on the rug and the clear mat is barely visible. Indentations in the mat (due to the weight on it) were mentioned in a previous review. To be honest we didn't notice indentations until we looked -- and they were very minor.
very poor quality. don't expect the mat to last very long. low durability. but it was cheap compared to other mats and i had a $5.00 coupon. get what you pay for.
Arrived promptly. The little nobbies on the underside of the mat hold it tightly in place on carpet. The good grip allows your chair to move easily. The size allows enough room to roll chair back & forth and side to side without running off mat.