Ring Alarm supports a sensor bypass mode, which allows you to arm the system even if one of the sensors is currently tripped. For example, if you want to arm the alarm but leave a monitored window open, the system will notify you upon arming that one of the sensors is currently faulted. You can choose to close the window to clear the sensor or bypass it, which will arm the system but not monitor that sensor until the next disarm/arm cycle.
The door/window sensors (also called contact sensors) work pretty well, but the same cannot be said about the motion sensors; they will detect motion after there’s been plenty of movement (if I walk the hallway and enter a room it will not detect, but if I sit for a few seconds moving in the hallway it will detect it then). This is still not a show stopper for me, as I have a dog and don’t plan on buying any more motion sensors, it will be all contact sensors.
I own and use 4 Ring devices at my primary and secondary home. Until last night, I have been very pleased with the product. Last night, we had a heavy storm at our second home and the electricity was off for a period of time. My Nest devices automatically reconnected to my wifi as soon as the power was reestablished; not so with the Ring devices. Ring required my to physically be close to the devices with my iPhone in hand to reestablish the connection. This is a serious flaw for users like myself and one that Ring needs to correct if I am going to continue using their product. The electricity, and thus the wifi, at our mountain home loses power several times a year. I don't want to travel 700 miles just to reconnect a Ring device or two.