It's extremely difficult to find a chair mat engineered for carpet anymore. In my case glass is not an option and I don't wish to pay upwards of $200 for what's essentially a sheet of plastic. My hope was this "medium pile carpet chair mat" would perform as well as the mat it's replacing. I got my hopes far too high. I read the reviews and there has been a consistent complaint. The "bars" on the underside do not hold the mat in place. My former mat had good old fashioned spikes and NEVER moved. I thought this mat would be okay because one corner would be pinned in place by a desk caster and the opposite corner pinned by a small table. I thought wrong. Everyday it continues to rotate more in a clockwise direction while in bunches up at the desk caster. After a week it has completely walked out from under the table leg. Add to this the fact it's extremely soft. My desk chair sinks into it so deeply that it becomes difficult to roll out of the potholes. This problem didn't occur with the old mat until it was nearly 15 years old and the chair casters would catch in age cracks. For the record I did the "paperclip test" and verified the uncompressed carpet and padding is only 5/8" thick -- easily below the rated 3/4" limit. I don't know what the solution is to getting a reasonably priced chair mat that works properly with carpet. All I can say is this mat is certainly NOT a good solution.
When it came out of the box it was VERY hard to unroll. But once we did it was only a matter of hours that it straightened out on the floor. I love it!
The chairmat was delivered on the promised day and seems to be just what we expected. It was easy to place now the only question is its durability which only time will tell. That's why I couldn't give five stars.
After several attempts to have a chair mat on our carpet this one is holding up. The other ones cracked within weeks but this one seems like it is going to do the trick. I guess the old saying is true that you get what you pay for.