Bests & Worsts Reviews from Amazon

We had a fire. They worked. I was 30 miles from my house and was able to call 911. The fire department entered the house and removed the item that was smoldering. Beyond smoke, the house was saved. That's really the best review I can give. A little more detail: I paired 4 of these to my Abode home security system (easy). When smoke started, the fire alarms were triggered and immediately triggered the Abode security system which is configured to sound those alarms as well and send me an attention grabbing audible alert and pop-up notification on my phone. I actually happened to see the smoke starting on my security camera and wondered what was happening -- and then the smoke detector alerts confirmed what I was seeing. Frankly, what good are "dumb" smoke detectors if no one is home to hear them? You need to pair them to a smart home hub or security system.