Summary: "be patient don't break anything" is sentence that I have had say to myself too many time this past month. The mouse works like a charm. But the latency in the keyboard is enough to drive any man insane. I wouldn't recommend this keyboard to my enemy. I Have a few K260 and a K400 in use at my company and they work great and my previous wireless keyboard was an ancient logitech so I thought I was golden when I bought this.
Summary: There is a sever issue with this product. If you want to know the full scope of it please visit the support thread in this message. http://forums.logitech.com/t5/Keyboards-and-Keyboard-Mice/Severe-Latency-with-K520-Wireless-Keyboard/td-p/547142/page/5 The issue with this device is it can't work under heavy load. It basically drops its connection (the keyboard). Wish I knew before my return period was up. Live and learn.
Summary: I had connectivity issues with this product. I found that my typing would not keep up with what appeared on the screen. It would only catch part of what I typed and there was a definite lag even to have that show up. I also had problems with the mouse freezing up and not moving on the screen (whether the mouse was used on a mouse pad or on a desk top). I used the combo at work for 3 days and got so frustrated that I returned it.
Summary: The mouse is horrible. It is very dependent on surface color for it to work properly. I have used optical mice for years and almost every single time it was a Logitech because they were the best. However the M310 is horrible. It is very sensitive to the surface color. The color green that the box it came in (mk320 combo) will not work at all until you hit one of the other colors. Try it your self when you buy one. It also does not like to work on certain colors of denim.
Summary: I purchased this keyboard/mouse combo about 4 months ago. I am usually fond of Logitech items, as they are easy to use and are made well. Around 2 weeks ago, the mouse started to malfunction. Every time I would click once, it would double click. I thought the best remedy would be to contact Logitech support and start a warranty claim. The rep was nice, and he offered to send out another mouse as long as I can email him an invoice.
Summary: This keyboard freezes up and stops working -- don't know what the interference is. I thought it was my laptop, but discovered that it is the keyboard. The mouse continues to work, but this keyboard will drive you crazy. Unfortunately I did not check all the reviews before I purchased mine, but I see that others have the same issue.
Summary: I tried and tried to install this mouse/keypad bundle on my HP desktop. Only part would install and it would be different parts each time I tried, except that in all cases the mouse pointer would never move. When I tried unitizing it totally blanked out my PC. Had to do an emergency shut off and start over. Never did get it to work after 4 hours and many attempts. Returned it to Staples bought a MK320. It loaded quickly and there has not been a single problem.
Summary: Had a M310 Mouse and liked the fit... so I purchased the combo K520 (keyboard) & M310 (mouse) for my other PC. Well much to my disappointment this keyboard stops working at random moments. The mouse continues to work but the keyboard just stops... keep hitting keys and after 10+ seconds it may start again.... after 4 weeks I am getting ready to give it up. Will consider another brand this is a big disappointment. PS. I have the K320 board and it does the same thing ...
Does not work with Dell Inspiron 15r SE running Windows 8
27 January 2013
Summary: I contacted Logitech customer support with a detailed description of the problem. The first time I contacted them, they had me replace the keyboard combo, shipping at my expense.
Pros: I have similar product from Logitech on Windows 7 workstation that works just fine
Cons: When used with a Dell Inspiron 15r SE running Windows 8, the mouse driver interferes with the trackpad driver and the keyboard does not work at all. When trying to unpair the keyboard or unplug the unifying receiver the Logitech driver crashes the computer. More specifically, it appears to crash all the HID drivers, making all input devices non-functional.