I'm using this on a very short pile carpet but within the first three or four hours of using it my chair had already created two indentations where the wheels were and it has not recovered. This is not made of good material and I would recommend something that's a little more thick and resilient
The mat still moves regardless of the spikes on the bottom of the mat. But either way it was a good size for the room and the chair easily glides over the Mat
clearly i may not have understood which mat i need - i'm not smart on "carpet" - from the very start this mat would NOT stay put so i must assume it's designed for a very different style of flooring/carpet. regardless in less than 6 months it started fragmenting/cracking/disintegrating/breaking apart - possibly ... again ... as a result of using it in a way (ie on a surface for which) it was NOT designed? ...but come ON? really? i'll spend more next time because i don't want to have to spend $35 every 6 months (on a floor mat) =/