Just as heads-up, customer support from Ring was top-notch. After a week of use, I had an issue with a sensor that wasn’t communicating properly. Fortunately it didn’t trip the alarm (I say fortunate as I wouldn’t want to local police to show up for faulty sensor). A late night call to the Ring customer service, which appears to be U.S. based, helped to resolve the issue. The rep was professional and patient. All told, I’m glad I chose Ring.
System is very responsive and mobile alerts are sent in real time. If the alarm goes off, you will get a mobile alert from the app with information about the actual sensor tripped; this app alert will be followed a few seconds later by a phone call from a representative checking on your well being. They will ask you for your “safe word” and if you cannot give the correct one they will dispatch a police officer. I also noticed if you cancel quickly enough with the app then they will not call you; I once cancelled after a few seconds through the app and the phone call came in, but before it could be answered it was already disconnected - which was great, no need to explain myself.
3 - If you do not answer the alert fast enough, you are locked out-- even though someone is standing at your front door. You cannot "turn on" the camera from your phone or tablet. If someone is there and you do not have an "ACCEPT" button on the screen, there is just no way to see or talk to them. This is obviously a software flaw. You should always be able to "wake" a camera remotely and talk to a person at your front door. Or maybe you just want to see the view outside your front door. You should be able to access the camera / microphone and enjoy your front yard.