Summary: Simply put, do not waste your money on this unit. It is not worth even $5.00.
Pros: Mouse works well and that is it for pros.
Cons: Logitech should be ashamed to put in the market a keyboard like this. I have owned Logitech keyboards before and they were awesome but this one is the worst garbage I have ever found in my life. My pc is right next to it and yet it fails constantly. It just stops working sometimes for 5 to 10 sec...
Summary: After 2 hours of use, seems like the USB receiver died. Plugging it into different computers, USB device not recognized. I plugged in wired keyboards into the same port, they work fine. Tried the Logitech MK320 on other machines running win7 or win8, usb not recognized.
Summary: Now to see how Logitech's warranty service works.
Pros: The mouse still works.
Cons: I work at a Junior College, wireless keyboard and mouse are helpful when servicing students. We generally use the inexpensive MK270 which seems to hold up well. This was purchased for the reference desk. The keyboard went dead in less than 3 months service.
Excerpt: The description claims that it transmits up to 11 feet away...it has trouble transmitting even 6 feet away in an open room. If you have it 6 feet 1 inch away from the transmitter your mouse will spotily move.
Excerpt: Staples only warrants this product for 14 days unless one purchases a Staples extended warranty. According to the packaging Logitech warrants it for 5 years, so one must phone Logitech, if and when there are problems. My keyboard wouldn't always interface w/my computer.