Original keyboard has been replaced by Logitech already at only 1 1/2 months old. The Battery Sensor failed, rendering the keyboard useless. Review of discussion groups on this keyboard indicated this appears to be a common problem.

Unreliable Performance

I like the wave design. No problem with the setup or wireless. Battery life has been great. I really wanted to like this keyboard. I'm just tired of the keys being so hard to press. Not smooth at all.

I really love using it daily. There's not many keyboards out there that offer such a great means of media access.

The keyboard was easy to set up. The keyboard itself is not made for the typist. The space bar is loud and makes a clanging noise. The keys do not have a bouce that is needed for fast typing. After an hour the tips of my fingers and finger joints were throbbing.

Egronomics are great, its customisable,its comfortable BUT the keys aren't responsive enough for a great gaming experience

I hope that Logitech gets moving and creates an update for Win 8.1 because many of the keyboards functions do not work under this operating system. Nice board but not worth paying the extra money until the functions work with Win 8.1.

I am not sure whether I like wireless or wired mice and keyboards better.

Long range wireless keyboard; thin; lightweight; small receiver; unified technology

Not as comfortable as my other keyboards; support feet flimsy; not made in USA

I hope that Logitech gets moving and creates an update for Win 8.1 because many of the keyboards functions do not work under this operating system. Nice board but not worth paying the extra money until the functions work with Win 8.1.

Heavy typists would do well to investigate the Wireless Keyboard K350. It's comfortable, easy to get used to, and exploits Logitech's Unifying technology, which lets you connect up to six compatible peripherals to a single USB receiver.

Comfortable keyboard design; Impressive list of customisable features; Affordable compared with other ergonomic keyboards

Inconveniently placed media keys

You'd think for $50/60, a keyboard maker would put letters on the keys that wouldn't wear off, wouldn't you? Ridiculous. "N" is gone, "E" and "A" are fading fast, "C", "M" and other high-usage fee showing lots of wear. Maybe Logitech could spend another 5￠ and fix the problem.

Great keyboard in most regards; Responsive, good battery life, good wireless

Keyboard letters wear off