Instruct: Classify a review into positive or negative sentiment.
Query: Up 1 month . . . and the false alarms began

I purchased 4 of these to replace detectors that were 15 years old. Worst decision ever. I HATE these things. One month after they were installed they began going off one evening. No smokers, no one cooking, etc. They proceeded to go off 2 more times that night until we finally disconnected them. Two days later I come home from work to find the fire department at my house. The stupid things had been going off all day. The "faulty" detector was identified. I bought a good old fashioned battery operated one to replace it. I'm waiting for the others to fail now. Nothing is more nerve wracking then dealing with this.