I am using this product on top of a low pile carpet and it works well. It is colorless so it is not distracting. It stays securely on the carpet and can be easily wiped. The only "con" was that the tape around the rolled up mat needed to be cleaned off with an all purpose household product (took some elbow grease) but Staples Customer Service said that they are working on this with the manufacturer.
Someone had rolled these pads up and taped them using clear packing tape. It was a good idea to carry them easily but it took about 30 minutes with a rag and goo-gone to remove all of the tape residue.