It took quite some time for it to conform to the carpet especially when the chair was rolling accross it. I kept tripping over the corners of it because the seemed to want to flip upward.
It has take over a week for the flat pile carpet chair mat to somewhat smooth out under my office chair. It has made mobility around my desk area easier to do which is a main point of why I purchased it. Also the mat was on sale! Overall I am pleased with this purchase and believe it was and is a great investment.