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.
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.
I work out of a home office. We just had new hardwood floors installed. I didn't want to chance scratching the floor with my chair casters so I bought this chair mat. It works great and my only gripe is that I would really like to have one about one foot larger in each direction. But this one will do for most applications.