had this keyboard for 5 years in use. The size, flatness and stop actions have inspired me. Now made of wear noticeable. The same keyboard, date of manufacture lt. Underside 04/2014, no longer has the same quality. Also, the keystroke is not as precise. These hooked to a key from the start. So: retour. The decline in quality, which is reflected in so many other areas, is already frightening. I'm going to the Tip of the other side follow: Wash the old keyboard and allow to dry thoroughly. Around 20 Euro is the new "quality" in no way worth.