In the article description was talk, which made me be noisy from "Unifying Adapter". In the small print, the compatibility has been confirmed with Logitech products, which refers clearly to the origin of the manufacturer.
The keyboard is compact, a numeric keypad was important to me (but not a standard keyboard 108 keys) and the design is modern. The keys are sufficiently proportioned, have a quick crisp attack and blurred not in itself. Only the small size and the associated arrangement of the function keys is something that you get used to but after a short time.
The radio transmission works fine, although the receiver is in the PC under the glass tabletop. The keyboard requires just 2 AAA batteries (use Eneloop), but after the positive experience with the Unifying these devices a while should hold (PS was the Dell keyboard to log on to the receiver of the trackball problems).
For mouse I can not say anything that is unused in the original package. But the price of the sets is justified only for the keyboard (~ 45, -).