Currently have mat on top of carpet. Chair's rollers tend to sink into the mat quickly so rolling can be difficult. It does protect the carpet (which was the goal). That said I'll probably invest in something a little better/thicker next time around.
I use this product at my computer desk on a carpeted floor. The mat's spikes prevent it from slipping and moving on the carpet when my chair on rollers slides on it. The clear color allows the carpet to be visible underneath. I bought this mat to replace a similar one that had multiple cracks. I am hoping that this one lasts well.
Would not buy again and thinking about returning the mats. They are not thick enough and I am using them on very short pile commercial carpet. The chair is leaving permanent dents in the plastic when I sit on it and I am not overweight whatsoever. My old mats that were replaced by these were in better shape after 10 years than this new set only being 10 days old.
It was a good choice for me. The price was perfect. It does move some after using it for awhile so you have to readjust it periodacaly. Over-all I am happy with this product.
This is the second same type of product that I ordered 6 mos. ago and I am hoping that this time it will last more than 6 months. Why did I purchased this same type of floor mat again? Because it was my only choice and our major office buying account is with Staples. Overall we love Staples and we are keeping the faith.