Since then I have at home the keyboard, I am always happy when I get to use them. The writing feeling is just awesome. Admittedly the poor lighting of the alternative key assignment is not optimal, but that makes the keyboard with all the other properties up for it. The volume is much higher than with electronic keyboards, but still acceptable. The processing is very solid. The additional USB port on the back is a plus point. Use this setting you can adjust the lighting well to the current ambient light. Who wants a mechanical keyboard ends up here certainly a direct hit. Again show the developers at Logitech what it covers.