I purchased this mat to make it easier to move my chair in front of my home office desk as well as protect the underlying carpet. It is too soon to tell how well it wears over time but it adds to my comfort level as I work in front of my computer.
The chair mat probably needs longer spikes because my carpet is not flat pile. I’ll continue to use it for a few more days but if it continues to shift I may need to return it for another one.