This mat is wonderful--it does not do the dimple effect when a castor from a chair sits on it. It took someone at the store helping us what was right for us and listening to what I did NOT want. But it is perfect and easy to slide chair over even though you've been sitting on the chair for some time. It is NOT rolled up when it comes delivered to your door.
This is a necessary item if your home office is carpeted as mine is. My first one lasted 6 years with 8-10 hours of use daily. Finally had to replace when it cracked apart where the chair wheels usually sit. I hope this new one lasts as long or longer.
We have generally paid more than twice as much for this size mat from another supply company but find the quality of this mat to be equal for a significant savings.