The keyboard, on the whole, is of acceptable quality, but. The layout is not standard, and it is really challenging to become accustomed to it. It is quite difficult to type when blind. Materials, tactile sensations, construction quality, and pressing mechanism are some of the positive aspects. Having these drawbacks: Could this be the reason that Logitech develops its own layout? After working on normal keyboards for twenty years, it is impossible to relearn new keyboard layouts. Blind typing does not work.