I've been waiting with excitement for the Nest Protect to ship because any kind of broiling in our apartment results in a fire alarm which triggers all the alarms to go off. Then it's frantic magazine swatting and window opening all of which usually occurs when it's freezing outside. The Nest Protect promised an easy wave to silence the false alarm.
Today was the day. Amazon Prime dropped off two hardwired detectors. The setup was quite simple, I used the QR code to configure the device with the iOS Nest app. From there it was disconnect the old detector and the mounting ring, switch out the wiring harness, and screw in the new mounting ring. I didn't follow the exact instructions since I ignored the part about powering down the circuit breaker box. I don't recommend this if you haven't worked with live electricity before. Next step will be to install the other Protect in Teddy's room and test both of them.
From an ease of install, it was a snap. I'm not sure how bright the nightlight feature is but anything to make shutting down a false alarm is worth it with three small kids.