Who at Logitech's "genius" level thought it would be a good idea to make the signs and text gray, with the background also being gray? This is probably the sole and biggest drawback of this Claudia, since it infuriatingly interferes with one's ability to use it comfortably. The issue is that if you do not have great lighting and you are not an expert at touch typing, then you just have to make continual use of the backlight because, otherwise, you simply cannot see anything. This is a problem because touch typing is a skill that requires perfect lighting. It is not possible to leave it turned on permanently either. As a direct consequence of this, we are subjected to the sight of an agonizingly flashing keyboard, which, by the second day, has already begun to irritate us. In addition, activating the lighting does not always work immediately, and you have to keep your fingers over the keyboard for a split second before it takes effect. If there is no possibility to test in advance, you should not take the test. PS: Added a star. Because Claudia continues to perform exceptionally well after being utilized for half a year. Despite this, the lighting continues to be a nuisance. Disabled.