This Chair Mat is too soft. I even purchased extra large chair casters to more evenly spread the weight. It did help. There are depressions on the mat and I can't slide along it.
I have worked in offices for a very long time and know the difference of quality. This is a good buy.I wasn't sure it would be as the thickness is hard to guess but it works very well.
I bought this mat as a replacement and it works excellently. The previous mat lasted me 5 years but was cracking in the center because it was a folding chair mat-- the center seam finally was breaking away. This mat was a great value for the money and I highly recommend it.