While it does a great job of protecting the carpet I sit for long periods of time and I found my chair casters literally "sink in" to the mat so rolling is not much easier even with this mat. I should have ordered a heavier duty mat.
Although I do not have a "high pile" carpet I purchased this chair mat because I weigh well over 200 lbs and sit at my desk in front of my computer for a minimum of six hours a day. This is the type of "heavy duty" chair mat needed by someone like myself and I would recommend it to anyone weighing a minimum of 200 lbs.
I LOVE THE MAT BUT THE LABEL THEY STICK ON IT TOOK ME 30 MINUTES TO TRY GETTING OFF. I PURCHASED TWO MATS SO THAT WAS AN HOUR OF MY TIME. OTHER THAN THAT IT IS GREAT - WHY THEY PUT GLUED LABELS ON SOMETHING LIKE THAT I WILL NEVER KNOW.