Mine came in yesterday.
The wireless mouse works fine; but keyboard refuses to comunicate with the base station. I would not mind using the wireless mouse (along with my existing, wired keyboard), but the way this appears to be set up indicates that the base station talks to the computer through the keyboard port. (So, you could presumably use the wireless keyboard and a wired mouse, but not the other way around.)
The wireless mouse feels great to hold; it has a very nice balance and feel. But to my eyes, the mouse cursor movements appear to be less smooth than my current Microsoft wired optical mouse. YMMV.
Also, while the keyboard and mouse look clean; they are far from spotless. My current, two-month-old, wired keyboard looks far more pristine. I also like the feel of my current keyboard (MS, basic, wired) more than that of the Logitech wireless keyboard. The impressive thing about the Logitech wireless keyboard is the number of onboard controls and programmable keys. I am sorry that I will not have that facility. I will be seeking an RMA soon.
Hope this information is useful to some of you.
~ JC ~