After I installed the second Ring I noticed I was not able to connect as quickly and sometimes not at all to the doorbell. I watched a few YouTube videos for troubleshooting and BOOM! I found the issue (I can not fault Ring for this). My current doorbell transformer was only max 16V of power. I went and purchased a max 24V transformer and a plug-in WiFi extender (approximately $50 total for both). This solved the issue and we were able to connect to both doorbells with no problems. Since July of 2017, and the upgrades, we have had no issues. We had temperatures as low as -20 degrees Fahrenheit and they were still working.
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.