Summary: PROS: Keyboard: This may become my favorite keyboard of all time! It is SO easy to type on because the keys are very flat (not raised). It is THE BEST if you are a fast typist and/or go by "feel". Most keys have a depression in the center, but the bottom row of keys, the top row of keys (ESC key and F1-F12 keys), and the backspace key are raised like a bump.
Summary: I have been purchasing Logitech keyboards and mice for almost two decades and been pleased with the products until I bought the K520 wireless keyboard combo. The keys are much flatter than the wired keyboards I'm accustom to, making it exceedingly difficult to do any speed typing....more like a laptop. Also upsetting is the more expensive Logitech wireless mouse that I had previously, will not interchange with the M310 that came with this combo.
Summary: Alll I did was plug in the receiver and take off the battery savers. took less than 2 minutes! Downloads automatically. I had purchased two other brands in the same week and the batteries in the keyboards were dead and when replaced kept cutting off. The logitech was more expensive but worth it!
Summary: I received this as a gift almost two years ago and have been using it daily since. It's a very nice keyboard. Although the keys are half-height the travel is acceptable and the "clickiness" is adequate but soft. They are slightly cupped to ensure your fingertips naturally hit the centre of the key. The keys wobble side to side a bit and some keys grind against their neighbours, particularly frequently-used keys like the down arrow (for me).
Pros: Works perfectly, even in Linux, Good battery life, Tiny receiver for both mouse and keyboard, Good reception
Cons: Keys a little loose/wobbly, Some keys grind against each other
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: I really like this keyboard, but I use a trackball, so the mouse is of no use to me. I would love to get it without the mouse. I wore out the first wireless keyboard (ex110 by Logitech) and this is the replacement.
Summary: The keyboard and mouse is fine. I have been using it for 2 years. Light Gaming,web etc. Battery consumption is minimal. However a really annoying bug started some time ago and Logitech does not answer the LAG problem. See this thread before buying: http://forums.logitech.com/t5/Keyboards-and-Keyboard-Mice/Severe-Latency-with-K520-Wireless-Keyboard/td-p/547142/highlight/false