We purchased 2 of these mats. After reading the reviews I was concerned that they would not lay flat. When they arrived I flattend them out one ontop of another and then placed heavy 5 gal. jugs of water on the corners and center for 2 days. After that they were completely flat and we haven't had any problems with them.
It would be nice if Quill would not put a huge sticker directly on the mat that is impossible to remove. Also should be delivered in a box or at the very least wrapped in cardboard. Not just a mat and big fat un-removable sticker!
It was half price and I needed some for the office and home. Have only been using for a couple of months - as recommended using on low pile carpeting. It is rated as an ECONOMICAL mat and I expect to get about a year's worth of service. A great value for the price I paid.