The mat is too flexible. The chair wheels sink down into it and then it is hard to make them roll out of these indentations. The main reason I wanted this mat was so it would be easier to roll the chair around but it didn't.
I like the size but as others have commented - after a few hours of being at my desk it moves backwards & I have to pull it forward so I can have my chair all the way up to my desk.
We bought several of these mats to protect the new low pile carpet in our offices. We've only had them a few weeks but they are holding up well so far. The mats were curled up due to being rolled up for shipping but by the next morning they were flat.