Bests & Worsts Reviews from Amazon

I received the nest smoke detector January 30, 2018. Installed and tested. On March 9, 2018 some kerosene soaked rags caught on fire in my basement. The house was full of smoke. As I called 911 the inexpensive smoke detectors in my home were going off at the nest was not. Later I checked the app and it said there are no issues. When tested it stills says it is working properly, but obviously it does not. I have to say I do like the thermostat, but I am so disappointed in the smoke detector.