Bests & Worsts Reviews from Amazon

I have a rental property and this year, the city's new regulation required installation of these detectors. One of the detectors malfunctioned and the terrified tenant called 911, who proceeded to do over 1000 dollars in property damage. I subsequently found out that even the EPA has admitted that many of the CO detectors they tested were unreliable, and either went off at too low of a level or did not sound at dangerously high levels. According to their website, the best way to keep the building's inhabitants safe is to have fuel-burning appliances properly installed and maintained by licensed professionals to make sure that the gases (including CO) are vented properly. I ended up doing a lot of research related to CO as a result. I have the documentation from the Fire Department indicating the levels that they measured (WAY BELOW the low threshold on the detector) even near the detector. I knew that a problem was unlikely since the heat wasn't even ON at the time. Nevertheless, they broke into two apartments, destroying irreplaceable historic doors and frames. Even the fire chief told me that if I have a hard-wired smoke detector/CO detector combo, I should get it replaced as they have had false alarms with that type of detector. But as mentioned on the EPA website, and evidenced by many other reviews on Amazon etc, CO detection is apparently in it's infancy and I'm surprised that these detectors are even being sold, much less required by law. Unfortunately, according to my lawyer, it's more trouble than it's worth to sue the city, so I had to suck up the CONSIDERABLE expenses myself. Not to mention my poor tenant, who was (unharmed of course) but anxious. I am so ANGRY, but the only thing I can do apparently is to WARN other people about these alarms. If you have one in your house and there's a false alarm, that's one thing. But if a tenant has a false alarm, you are vulnerable in many different ways. The WORST thing about this type of alarm is that if the CO part malfunctions, you've lost your smoke alarm as well. In addition, since it's installed high on the ceiling, if it false alarms, you have to get on a ladder to turn the thing off. I would not recommend the first alert smoke/CO alarm to ANYONE.