The chair mat arrived rolled up and taped with cellophane tape. The chair mat flattened very quickly probably because it is so thin but it took me an hour to remove the sticky tape. The chair mat immediately developed deep indentations over-night under the wheels of my office chair without me sitting in the chair. (FYI: My office chair is not heavy and neither am I and my carpet is less than 3/4 inch thick.) Sitting at my desk all day the deep indentations makes it very difficult to move my chair out of the indentations. This "extra-high pile carpet" chair mat is worse than the cheaper chair mats I've had in the past. It certainly is not worth the cost.
Even though this chair mat is designated as being for plush carpeted floors up to 3/4" thick the chair rollers sink into the carpet making it hard to roll the chair around. Stuck in a rut. At least I expect it to protect the carpet. I would have gotten the thickest one availabled but it's too large for the area.