Purchase and installation today, initially researched what is available for homekit integration, the truth is that if I found the belkin wemo available, I would probably choose it even though it is much more expensive.
I have quite a bit of experience with Aqara since my initial choices in sensors were from this company.
It is honest and has affordable prices.
At the price of 120-130 euros, there is nothing similar for home systems.
The installation is extremely easy, whether you choose the wired or wireless option.
I installed it wired to the cables from the classic doorbell and at a height of 140cm from the ground, and I used the base that provides tilt (I think 20 degrees).
At this height, you can see the entire body of a person standing at the door, but not from the waist down.
The resolution is quite good in lighting, in darkness I can see well what is happening outside the door, but I don't know what it will show if it detects a person (in darkness) because I have a motion sensor that activates the lighting.
On the computer, if you have the "Home" application open, you have a continuous stream of images that refresh every 10 seconds.
These are from the initial installation...
When I work with it a little more, I will come back.
Update:
I also tried the option to work only with batteries because it gives you the flexibility to place it wherever you like.
The limitations are that you will have to choose settings that do not drain the batteries, such as continuous flow and recording, which, however, give you a continuous image of what is happening outside the door. With batteries, you will have to choose, for example, only notifications where the device is activated and takes a photo only when someone is at the door. In this setting, you cannot have a live image.
In the test I did with continuous flow and recording, the batteries dropped 20% in 24 hours.