Divided into sections:
For those who type with the Blind System: The keyboard is a compact size click, and completely low profile. If you come from a high-profile full-size keyboard, like myself, you will face an alpha adaptation time. The position where you rest your palms is slightly different. It took me about 9-10 days to start typing at the same speed as my previous keyboard. Or my hands don't get tired (they were tired for the first two days).
Someone below writes that it is "plastic". I am surprised that someone lifted this object and found it plastic. The keyboard is a single metal plate. 820 grams total weight! It has a plastic cover underneath. I thought it was (also) portable, but you can't call it "portable" when you hold it. It can be carried, but one realizes that along with a laptop in the bag, the weight becomes significant for carrying it for hours. Of course, on the other hand, this is good for desktop use because the keyboard sits firmly on the desk. It doesn't move from its position.
The feeling on the keys is unique, it makes you want to write! This hollow they have made on the keys is very convenient for the blind system, and all keyboards should be like this. I wanted it for the Macbook Pro, personally I played a bit with the "Apple Magic Keyboard" (note: I think this is the target group Logitech was targeting when they released this MX series) I believe this one has a much better feel when typing. Of course, these are personal preferences, but I think it has a smoother texture. Apple's keyboard seemed more "dry" to me. Besides, it seemed very expensive to me, with 190 euros (!) for the black one I wanted. (The white one will become useless in 6 months).
It connected to the laptop via Bluetooth smoothly in a few seconds.
It has a sensor that lights up the backlight of the keys when you approach your hands. I didn't know that before I got it, it's a nice gimmick. Of course, I have the backlight turned off, it doesn't suit me as a person. For those who want it, it has a nice cool white backlight.
Of course, you know that backlighting drains the battery. Without backlighting, I charged it about 20 days ago and it still works. With the backlight on, I don't know how long it lasts. Definitely much less.
It has some noise, it's not completely silent, but it reminds me a lot of the "click-click" of Apple keyboards. Definitely much lower noise than high-profile classic keyboards.
Regarding aesthetics, which is beautiful on the desk, it doesn't concern me that much. I pay for practicality and durability, not for beauty. It seems to have both.
The arm rest is not necessary for me, but it should have been included in the package at this price point. The fact that they sell it for an extra 20 euros, I will leave it uncommented...
Regarding the price, I bought it for 120 euros (with a discount) and now I see it is priced at 102 euros (without a discount). A more reasonable price. 90-100 would have been a bit more reasonable considering the build quality, as you can feel that the keyboard is made like a tank. The friend who says below that he bought an HP keyboard of the same quality for 20 euros should write where he got it so we can all get four. From the market research I have done, there is no such solid metal keyboard that plays below 70-75 euros. And those are for brands like Satechi.
Sorry for the length of the message, I hope I helped.