Nest has the best Smoke/CO alarms? You mean one of the most expensive?
Per NFPA building code, I am required to have 9 Smoke/COs in my home. Also per NFPA, I am required to replace residential Smoke/COs every 10 years. So 9 Nest Protects at $119 comes to $1071 every 10 years, assuming they don't fail sooner (Nest Protect basic warranty is 2 years.) Or I can replace $9 wired/interconnected Kidde Smoke/Co for $81 every 10 years. I get at least 2 years out of quality Duracell 9v batteries. If I really want remote monitoring/notifications, I can add a Kidde RemoteLync (https://remotelync.kidde.com/monitor/), which monitors the Smoke/CO audible sound and is compatible with any manufacturers smokes built since 1999.
The marks (suckers) who bought into the Nest Protect scam will find out when they try to sell their home and the buyer's home inspector flags all the Nest Protects as expired. Good luck with that.
Hilarious video of NP in action.
I don’t think the Nest alarms are designed to live ten years are they? Six I think.