We have 3/4 carpet and chair rolls fine. Minor wheel indentations but chair sinks much less than thinner mat. Only issue is that after a week of placing heavy weights around the edges they still curl up about half an inch--just enough to stub a toe or catch a wheel if it rolls off the edge.
Product advertised for up to 1.25 inch carpet my carpet and pad are about 1 inch thick total. It is flimsy and slides across the floor over time. As well as developing wheel indentations if sitting in one place to long. Not happy with carpet matt.
Even though this chairmat has little grippers underneath it scoots forward so it's a little disappointing. One bonus we weren't expecting is that it has a beveled edge. We didn't see that in the description so it was a nice surprise.