When new, it is a very good pad, with which one has no problems. It adheres great on smooth surfaces and not very smooth, it is at least non-impaired. After a few weeks, the picture had changed completely. In the area of the palm rest to the pad sparked off the table and formed a centimeter high wave. This I was able initially to counteract by re-bending, but then as the middle of the surface, where occasionally the palm of your hand comes to rest, a big bump appeared, I was finally on. With such a loss of quality in a relatively short time, I wonder whether the manufacturer to perform any long-term tests or only reckons his great new product to sell quickly to unsuspecting customers.