It is under my office chair in my home office. It is better than trying to roll about on the carpet unfortunately I manage to create lovely little depressions when I sit in one place too long. Those depressions seem to be permanent (probably because I am a big person). But no worries it gets the job done.
We use these in the office and they get quite a bit of use. We have been using them for quite some time now and they last a long time. I have no negative comments at this time. I'll buy them everytime.
Using in home office; carpet and pad are about half-inch total; have had less than a week. A valley forms under the chair wheels when I am sitting but chair rolls easily once nudged from the valley. Depressions left by wheels bounce back soon after I get up from chair. Overall I'm quite satisfied with performance.