I've been pretty disappointed with the Doorbird so far. The app is okay, although I have had issues where they're gone before I get the notification - usually when I'm out of the house. However, the biggest disappointment is how unreliable it's been with the touchscreens. For a while, when initially set up, when you pressed the button, the touchscreens would ring and show up video right away. However, it was less than a day before this stopped working. Eventually, my installer got it working again, but it also stopped working again the same day. Currently, it almost never works. Not sure if it's the driver or something else, but the doorbird is hard wired and seems to be setup properly in C4.