Bests & Worsts Reviews from Amazon

Packaging: The alarm arrived in clear clam-shell packaging (yuck). In the shell was the alarm, 2 AA alkaline batteries, mounting screws, and instructions. I am a guy so who needs instructions. I am very satisfied with the packaging. Installation: Installation was a breeze. The two batteries were installed so I just had to push in the battery tray. The new alarm was replacing an old First Alert fire alarms that we have had for over 20 years. I now know you should replace alarms every 10 years. I removed the old alarm by loosening the mounting screws a couple turns, turning the old alarm to align the mounting holes and that was that. The new alarm has a base and alarm. The new base fit perfectly over the existing screws from the old alarm. Tighten the screws and the hard part is done. Then place the alarm over the mounting plate and give a 1/3 turn and you are done. Operation: After it were mounted I pushed the test button and the unit gave two sets of 3 beeps. Happy alarm. Observations: I have heard that the alkaline batteries provided last between one and two years. When they do wear out I will be trying Lithium batteries to see if they last longer. I tried Lithium 9V batteries in the old alarms and two out of four had corrosion on the positive terminal after one year. (P.S. the other three were new fire only alarms). The only time our fire alarms have ever gone off is when my bride has used them as a dinner bell. Alarm goes off = Dinner is done. PBJ for dinner tonight.