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) =/
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