If I hadn’t flooded my k740, I wouldn’t even look for a replacement for it, I was happy with everyone. This keyboard has only the appearance of pluses. Absolutely not worth your money. But it could have been a great product if not for the laziness, haste and greed of Logitech. PS There is also a little hell of a perfectionist - uneven gaps under the keys and, as a result, uneven illumination (I tried to show the D and R keys for example in the photo). Such things, I think, are bought by people with an above average level of aesthetics and want to enjoy using the device, and not sit with a twitching eye due to glitches and curvature. Build quality is low. PSS rattles a lot when pressed, it is extremely uncomfortable to work. I think this is due to a stupid design, which results in an empty space under the keyboard, which creates a rumble from pressing the keys and micro-vibration on the table surface. This moment was apparently taken into account when they created the Apple Magic keyboard. I took a photo for comparison and understanding what it is about, in the first photo of the k740, in which the back of the whole plane lies on the table and only the sound of pressing the keys is heard during operation. PSSS is a disgusting product. Logitech options does not install on any of the three PCs with freshly installed Windows 10 (different releases). The keyboard constantly flashes backlight, every 5 seconds, without software, the fn-keys work with glitches. the keyboard apparently loses the driver and because of this, most likely, the backlight flashes. And this is the second instance. And he is again slightly arched in the center, the quality is rotten. Here, people who write good reviews either do not pay attention to a bunch of bugs and overall quality, or, obviously, these are paid reviews. Absolutely not worth your money. And the main reason is the disgusting software from the manufacturer, in other matters, as always with Logitech. Too bad there are no alternatives. PSSSS the manufacturer also does not recognize the deformation of the case as a defect (see technical support answer). This speaks volumes. PSSSSS ated software to 8.34.82, software problems are gone.