It is everything it promises. Very easy to install. Very easy to use.
From the outside of the door, you don't realize it's not a regular peephole. Unless you're suspicious.
I don't give it 5 stars for the image quality. A person with not so good vision won't easily recognize faces. Other than that, it is incredibly useful. I would buy it again.

Nice, practical, and very easy to install. It has 2-3 components and works for many security and non-security doors.
It shows outside with the press of a button. The resolution is not good, but it does its job perfectly for what you want it for, to see who is outside your door.

Very good, worth every euro, quite high quality, very good coverage of the space, quality screen.
The only disadvantage is that it doesn't work without lighting, but I was aware of that before buying it.