Good value for money, good application.
Commissioning couldn't be easier. The image is very good.
The application for using the cameras is pretty well thought out: simple, user-friendly, and rather cluttered when it comes to options.
You have to look a bit and try to understand everything (there are probably instructions on the Internet that I didn't look for), and many of the options are quite useful. A subscription is absolutely not essential, but it's better to have an SD card for each camera.
To sum up, if you want to install a few (up to 32 according to them!) cameras in your home to alert you or simply to watch when you're away, this is perfect. All you need is WiFi that works properly where you install them.
It does other things (tracking, alarms, etc.) but I don't use it.
I don't know if it's the best, but I'm very happy with it.