Summary: I use it for few years now. Poor designed keys, they stick if you don`t push them just under certain angle. So it breakes typing flow. Bad product quality for the price, lack of Linux support and overall openness in technology. (AES on key encryption) Equall to lack of trust.
Summary: I want to love this keyboard, I truly do. The feel of it is great, the finish and battery life have been great, but the driver hasn't been updated to include Mac support, even though it has the OSX keys. It has been extremely frustrating.
Summary: I just want to echo other reviews I have seen, and even read before buying, but ended up ignoring. If you need a reliable keyboard for gaming or high use tasks from any distance, but especially from more than 4 ft, THIS IS NOT THE KEYBOARD FOR YOU. I understand the frequency range it uses (bluetooth range) can experience a lot of interference, and I've had reliability and range issues with bluetooth before, but nothing to this extent.
Summary: I have horrible tendonitis and carpal tunnel syndrome. I am a full time plus (avg 20 credit hours per term) on-line student so needless to say I am using my keyboard constantly. I love the feel and the ease of use. I like that it is a tad smaller than my old MS Ergo keyboard, however and this is a big one. I spent a lot of money on a keyboard and it began to fail almost immediately. I have replaced batteries checked software etc. First a few of the function keys died..
Summary: I purchased this keyboard to replace my Microsoft ergonomic keyboard. Initially I was very happy. However, after no more than 1 week, the keyboards connectivity became spotty at best. It's completely annoying to be typing and have only a part of your words show up on the screen. It's too bad. I've been purchasing logitech products for years. And this is the first time I've had an issue. I also have the m570 wireless mouse. I've never had an issue.