Negative Positive
Title: Failure, repeatedly
Review: Bought two. One was defective out of the box (three chirps). First Alert mailed me a new one quickly and without questions. The other failed in a month. Again, mailed me a new one. I think they are used to these things failing and are ready to mail new ones out all the time. Didn't have to return the old one, little paperwork. They were then doing ok for a while, but then one failed at a year. The other just failed at three years. The problem is, each time it fails you have to remove the batteries or it keeps chirping. Which means you are without a smoke alarm till you get a new one. Which could be a while. I don't have time for this trouble.
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