I bought it in combination with Xiaomi's door/window sensors and have set up a simple alarm system. I expected more functions and flexibility in the scenarios. Unfortunately, it does not recognize the AQARA camera that I have, which limits me.
It only has a USB cable, so I plugged it directly into the USB power supply on the router. I have everything connected to a UPS, so it has been tested to withstand at least 4 hours with uninterrupted internet supply.
It is placed in the center of the house and covers an area of about 60 square meters. It responds and sends notifications immediately.

I bought it to connect it with the Xiaomi kettle, which only works with Bluetooth. Obviously, it doesn't connect in general with Bluetooth kettles and that's why I'm not satisfied.

What is impressive is that with the network cable there is no loss in connection and when there is a power outage, everything quickly returns to its original function.

First impression and I will come back for more. Attention! It does not come with a charger to connect it to power!! You need to get an extra one!! In previous videos I had seen, it even had an ethernet cable. They probably changed the packaging because they think they became like Apple and don't even include chargers.... Unacceptable!

It's fine, although I haven't understood why they have removed capabilities that the previous model had, such as alarm, light, speaker, etc. Nor do I understand why devices connected to it cannot participate directly in the alarm system of the previous model (as additional alarm triggers) if someone has the previous model. Why does Xiaomi separate its related peripherals in this way?! It doesn't make sense. It was one of those things that I never expected to happen.
For example, whatever traps I set up on this, while they are normally visible in Xiaomi Home, they are not visible in the old Xiaomi hub (where one selects which devices will participate in the alarm)!... Simply because they are connected to another Xiaomi hub, but both are in the same Xiaomi Home!!!

Let's be honest, the main reason why someone would request it for purchase is because it offers connectivity to Bluetooth Xiaomi peripherals. Otherwise... a thousand times the previous model.

From connectivity and build quality, it's great, but it doesn't have any option for an alarm like the previous version (unless I didn't discover it). If you want to use the hub for security, then you shouldn't expect a corresponding function and you should resort to another automation. Nevertheless, it is a good device and the app works perfectly.

The device is of good quality in terms of construction. It works with other devices such as Motion Nightlights 2 and Door/Window sensors. However, that's where it ends.
The company's app is at least terrible, there is no way to create automations and smart scenes. I had to refer to countless forums to learn that one must use the Chinese servers, not the European ones (supposedly Xiaomi would release a firmware update so that most of its devices would use Matter and Thread protocols, but that hasn't happened yet, regardless of the fact that the company has announced the transition by mid-2022). When I asked the Greek representative, I learned that this particular product is not intended for the European market, even though when we connect the devices to the Chinese server, it states that it is not intended for the Chinese market. Somewhere along the line, we have lost the ball...
The device is cheap, however, it is a waste of money.