Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Saved my life last night

I can't speak for the other reviewers on here - maybe some of the complaints about this unit are valid. However, I can only say that this unit saved my house, and maybe my life, last night. My water heater pilot light went out, and a faulty thermocouple failed to shut off the gas. My basement filled with combustible gas.While this unit is not a combustible gas detector, the alarm sounded. It was loud enough for me to hear upstairs and I was able to shut off the gas and ventilate the area. I don't know what would have happened if I didn't have a detector. I am trying not to think too hard about it.If you don't have a detector, go buy one today. They are cheap, and many units (like this one), require ZERO installation. You have no excuse not to have one. You wouldn't live in a house without a smoke detector, and you shouldn't live in a house without a CO detector either.