Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The 4 Smoke Detectors of the Apocalypse

Does anyone else find it bizarre that all these smoke alarms are failing at 3 in the morning? What's that all about? This has happened to me twice; once about a year ago and again last night. Both times at 3AM. Due to my level of consciousness at that hour, the particulars on how I rectified the problem last year are somewhat hazy. As for last nights episode, 3 new batteries and a good cleaning did not fix the problem. After reading all these reviews, I have serious doubts about the reliablity of these detectors and I am not comfortable with depending on them to alert my family in the event of a real emergency.