The mat is already getting grooves in it after less than a week. I was expecting something that would have been a little thicker. Would not purchase again.
I'm 180 lbs sit on a standard 5-leg office chair. Mat sits on a 1/4" deep wall to wall rug.Sitting still 15 minutes at desk leaves a dimple under front wheels that's difficule to roll out of. Totally unsatisfactory. I have already ordered a replacement(tempered glass). It's like the plastic wasn't cured. My previous mat was thinner and totally satisfactory but too small(3x4)- kept rolling of the edges. This one is almost 50% thicker(0.1 vs 0.145) but much less supportive. I was suprised - and dissappointed.
The delivery was on right on time and price was good. As some mentioned the mat does tend to move forward on the carpet. So know you will need to slide back into place from time to time. Overall a good purchase for the amount we paid!
We have the mat under a desk and part of it had to be slid under our bookshelf. It sometimes "bubbles up" on the corner. Quality is good for the price. The plastic seems very pliable. Our older one seemed a little more stiff but I don't know if that is better or not. It cracked after about six years of use (which is very good in my opinion.) Perhaps the pliability of this one will make it a better mat. I really can't say but I'll be happy if it also lasts five or six years.