I have one of the 4K NVR systems (RLN8-410) and it leaves something to be desired. In the age of AI and other advanced motion detection, this system is lacking. There are so many false alarms as the motion detection just looks for differences in pixels from one frame to the next.
I wanted a locally saved Security system and this was highly rated, but if I had to do it over again I would hire a professional to setup a system that is actually reliably detects people. When it rains, expect a false alert notification every 30 seconds. Literally had over 100 notifications while I was trying to watch a movie.
I am hoping they come out with an NVR with AI built in. Even with PIR there are false detections (have a Argus Eco with solar as well). I think the cameras themselves are great quality and have a good picture but the recording side needs some TLC to stay relevant.