I needed a keyboard to connect to a PC via Unifying and via Bluetooth to a Macbook. Because I work on two devices at the same time. This keyboard fit right under all parameters including both layouts. There were some doubts before buying at the expense of notches on the keys, but after typing, I realized that it was even more pleasant. She also has a nice heavy weight. The only disappointing thing is the touch sensor. I have a Linnmon countertop from Ikea. And it feels like it conducts electricity (or whatever the touch sensor is based on). Sometimes, when hands are on the table, the backlight turns on and off every few seconds. There was a K800 before and there was also a similar glitch. sometimes this glitch is not. Now I tried to reproduce a similar situation, but the backlight did not light up. But you can touch the table on the back side under the keyboard and the backlight lights up.