We needed to replace a chair mat that is being used on a low-pile carpet in our home office. This chair mat has the "carpet teeth" on the underneath side to secure it to the carpet so it does not move when the desk chair glides over the mat. It was originally reasonably priced but when I went on-line to make the purchase for pick up at a local store there was a coupon offer for a 20% discount! Since it was not a shipable item it was ready for pick up at a local store within just a few hours of ordering.
Great price on this chair mat but it is too thin and did not hold up to normal use in a home setting. Cracked in several places now and will be replaced soon with a heavier version.
This size is actually just fine - if I'm roaming any farther than this I might as well stand up. I'm pretty sure that this new one I just bought for my boss' office is the same as the old one I'm still using and though mine's old and has cracks it has not discolored and it doesn't make that crackling/crunching sound of old brittle plastic it's just softer.