Rose first let me say thanks for the reviews. But just wanted to let you know (and maybe the nest guy you talked with also) that you can choose to only get notifications for people and not motion. This has been available for at least 3 months now. Also have only had one time when it had reported a person and was not. Car lights was what it really saw.
Ring’s motion sensors and contact sensors are much more traditional than Nest’s, which cleverly combine the two into a single device that also adds a nightlight. Nest’s base station also combines the keypad with it and adds even more motion detection sensors – Ring’s separate base station and keypad approach is almost clumsy in comparison. But it is possible to add multiple keypads to the Ring system, so you can have one at each entry way or in your bedroom if that’s a more convenient place for it. The keypad can be placed flat on a table or mounted to the wall, and uses a simple MicroUSB cable for power. Its internal battery lasts between six and twelve months, according to Ring, so it’s possible to install it in a location that doesn’t have an accessible power outlet and just charge it occasionally.
At 3.2 by 0.9 by 0.9 inches (HWD), the Z-Wave contact sensors for doors and windows are bulkier than the sensors that come with the Vivint Smart Home system (2.5 by 1.0 by 0.5 inches). They're each powered by a CR123 battery that is rated to last three years and can be installed using double-sided tape or with mounting screws. The motion sensor (3.5 by 2.4 by 1.7 inches) also runs on a CR123 battery and uses a Z-Wave radio to communicate with the base station. The range extender (3.1 by 1.8 by 1.1 inches) plugs into a wall outlet and extends the Z-Wave signal by up to 250 feet, so you can place sensors just about anywhere.
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.