The King of Ergonomic Keyboards has been found!
Logitech Craft
And how could it not be? It is the only one that has a Crown (aka crown), which is the metal wheel that makes all the difference from the competition.
Watch the video and you will understand!
https://www.youtube.com/watch?v=B-wVpa7b2Ak

I don't use the joystick for anything other than sound, so I lose a lot of its functionality. The battery lasts about 5 days with daily extended use. The fact that it is backlit and wireless is a rare combination and personally satisfies me completely. The lacquer on the button is very useful. The keys are silent (similar to a laptop). I like that there are sensors and when my hand approaches, before even touching the keys, it lights up. The price is high but I would still buy it.

Update Jan 2021:
It continues to be my favorite keyboard. Additionally, I have paired it with 3 devices simultaneously: desktop, laptop, mobile. By pressing the three special buttons "1", "2", "3", it switches instantly to the device I want! <3

This specific keyboard is mainly targeted towards desktop publishing, designers, etc. applications.
Its advantage lies in the presence of the "CROWN" dial, which provides additional options such as brush settings, etc., if you are not working with a tablet.
Unfortunately, it is only suitable for right-handed people due to its left-hand placement!
So, if you are left-handed and want to use it, you have to leave the mouse to adjust it.
Apart from the scroll wheel, the keyboard doesn't have anything special to offer. The typing experience is very shallow, the build quality is average for the price you pay, and it doesn't have a wrist pad or tilt adjustment.
Personally, I consider the cost to be excessive - not more than 100€!
I'm tired of paying for supposed technological innovations, such as Logitech powerplay, which doesn't cost them anything to manufacture, but the cost to the consumer skyrockets.

A mediocre keyboard from a company that generally produces quality products. It definitely isn't worth the almost 200€. Heavy and completely flat without the ability to lift with a strange sensation of the keys when using it. I regret buying it and not getting the Logitech mechanical keyboard.

Excellent, even though the price is quite high, personally I haven't regretted it. Through the installed application, you can control it and if you have any issues, they are resolved immediately, but overall the service is such that the corresponding Microsoft products for me are much inferior. Bravo to the company for both the mouse and the wonderful keyboard!!

Update 19/08/2019:
I continue to support what I wrote after many months of use. I won't change it and I will never change it. It is incredibly functional and users who wrote negative comments must have bought defective products from the beginning. Also, the use of the application is incredible and in combination with the mouse, it is an excellent tool. Bravo to the company, but the cost is excessive!!

Update 09/01/2021:
Everything is perfect, a perfect professional tool and even if the money was quite a lot, I still haven't regretted it!

Good build quality and nice typing feel (you need to get used to the keys at first). You feel like you have something premium in your hands, but I don't believe it's worth 200€ by any means. At 100€ - 120€, it would be a good choice.

It is a very good keyboard, I just gave it 4 stars because I don't think it's worth 200€!!! It would be worth the money for me at 150€

Very good keyboard and overall I am very satisfied with everything despite the high price (quite high!!). One thing to keep in mind is that you lose the Bluetooth connection almost every day(!) and that's why I give it a 4/5. Since I switched to "unifying" mode (in other words, using the USB adapter that it comes with) which takes up one USB port, I no longer have connection problems.