I was concerned when I got this. I'm used to very stiff mats over this heavy carpet. It seemed like the wheels were sinking into the mat but it works great! Chair rolls easily and it's more comfortable.
Bought two of these. The one for my office is great. We have "commercial" grade carpet on cement flooring. No problem. However for my home office...on friese carpet with pad...the material is so soft and flimsy that the casters on my chair keep mashing down into it...and are a pain to roll out of those depressions.
This product is too soft and does not work well on normal carpet. The edges stick up so if a wheel rolls off the matt making it difficult to get the wheel back on. The matt has indentations from where the chair normally sits which also makes moving the chair difficutlt. The description above sounds like it would be a good use of the product definitely not good for traditional in home carpets.