What "genius" at Logitech came up with the idea of making gray signs and letters on a gray background? This is perhaps the only and fattest minus of this Claudia, stupidly interfering with comfortable use. The problem is that if you do not have perfect lighting and you are not a touch typing master, then you simply have to constantly use the backlight, because otherwise you simply cannot see anything. You can't turn it on all the time either. As a result, we get a keyboard heart-rendingly flashing before our eyes, which already on the second day starts to enrage. In addition, turning on the backlight does not always work quickly and you have to hold your fingers over the keyboard for a second. Do not take if there is no opportunity to test in advance. PS: Added a star. Since Claudia is very good at the end of six months of use. However, the backlight is still annoying. Disabled.