We got this for a low/med carpet thickness with an office chair that has wheels. Within a few minutes of sitting in the chair there were visible indentations from the wheels. It's better than not having anything on the carpet. I also purchased a more expensive Floortex one and it is MUCH better quality than the Staples one. This one is just good enough as long as you regularly move the chair so the indentations to stay in the same place.
Chair sinks into mat after awhile so you have to try to roll past the divot created. (I am not that heavy). The mat does scoot around on the carpet though most every mat I have had does so. Otherwise the mat works okay.
The label attached to the mat was very hard to remove. Had to use a hair dryer to melt it a bit before it could be scraped off. A sticky residue was left which also had to be cleaned off. Time consuming. Despite thickness of the mat chair wheels sink into it some what which may make it difficult to move the chair without standing up first. Inconvenient.
Grandson told us the carpet protector was the perfect size for his new gaming/race chair. The next larger size protector wouldn’t fit under his desk. 👍