Bests & Worsts Reviews from Amazon

This safety device does not have an acceptable record of functionality. We loved the nest thermostat and got two Protects when our son was born. Several false alarms (warnings, which can be silenced by pushing the button) have occurred with both of our nest protects, and now (in the middle of a nap!) we experienced a false alarm that was beyond the initial warning, meaning it couldn't be silenced without removing the batteries. Since I wasn't the one who installed the nest initially, and thus wasn't aware of the twisting motion required to access the screws, I had to call customer service to ask for assistance in dismantling it, while holding a screaming infant next to an (appropriately) LOUD alarm. And then (reassuringly) after the batteries were out of the alarming one, the connected protect in the basement started going off, alerting me to smoke "upstairs" from the now-battery-less protect. It was, comically, worse than the irritations depicted in the nest advertisements that emphasize the frustrations of traditional alarms--in addition to the ordinary problems, you have a soothing woman's voice reminding you "this alarm cannot be hushed" every time you inadvertently press the center button, the whole time you're handling the device. If this device can't accurately detect NOT FIRE, how can we be sure it will detect smoke/fire/CO? The customer service person was kind and apologetic, but a replacement unit doesn't cut it if we don't accept that this device will alarm appropriately in a true emergency. My recent internet search revealed that many nest users report this problem, which seems to occur at 2-3 am (so some human-activity-related cause like excessive dust or condensation from showering is very unlikely) in both wired and battery-powered units. I'm glad I wasn't hustling older kids out of the house at 3 am, that my unit wasn't wired, and that we didn't waste the resources of our local emergency services because I suspected that the alarm was false. I will be returning to traditional fire/smoke/CO detectors so that in the future, we can do what we should be able to do if a fire alarm goes off upstairs and we're downstairs: leave!