This is a really good doorbell. I simply plugged in to my PoE switch and it worked. Setup using the webpage, and I managed to connect it to an existing NVR system due to it's ONVIF and RTSP support. The chime is good for me as I live in a small house so I've plugged it in to the hall way. There are ways to make this work with existing chimes, but not conventional methods for anyone to follow. I like the fact hat I can use an NVR, or an SD card. I don't use the rich notifications etc. The downside to this door bell is it doesn't have a call feature as you'd expect to get a phone call when someone pushes the bell button. You can control the lighting on the bell, I have it so it lights up when someone approaches. Build quality is good. They need to add the call feature.