I had recently bought the Martha Stewart simple desk and fabric chair and realized it was too hard to move the chair in order to sit at the desk. I also didn't want the chair to push permanent holes into my carpet. I was afraid I'd stub my toe on the mat but it lays perfectly flat and hasn't given me a problem at all. I had expected to have to put $40 to $50 into such a mat but it was less than $20! You can't beat that value and even though it isn't the highest quality available it works perfectly fine!
This product comes folded from the factory. It took several weeks and weights before product flattened enough to use. There are still ripples which prevent mat from hugging carpet.
Next purchase I would buy a bigger mat. Thought this would do the job. Got a deal on it deals are not always the best. Probably great for smal desk area.
Before using this carpet mat the roller chair would get hung up on the throw rug. This mat lies flat on top of the carpet and under the computer desk. The chair flows smoothly across the mat and because the colors of the "covered" carpet are seen vividly it is difficult to tell that a mat is on the floor. The mat fits perfectly between the legs of the desk without any trimming. Besides being perfect for the roller chair it is also excellent for walking. I would recommend this mat for any application.