Arrived in time - bend like hell. Mat is to thin and moves spikes are way to short to have any effect. Chair wheels dent the mat very heavily - makes moving the chair around difficult at times. Does not work well on thicker carpets. Not worth the money.
Cons: - Does not stay put on my carpet - constantly has to be moved back into place - Huge indentations from my office chair in the mat constantly Pros: - Cheap
This mat is a smaller size. The teeth really hold to the carpet. My chair fits exactly the way it should. My feet even have room. I do not wear shoes when working from home.
I really shopped around for size and price and settled on this combination. It is fine but remember that the chair casters of anyone over 100 and some pounds will make indents in the plastic. I knew this and can live with it. To get a thicker mat costs a lot more money.