Easy to fit, nice design and would buy again

Pretty easy to install on the existing wiring. The set up of the alarms is really simple just like all other Nest devices. I bought two of these to replace the existing devices that seem to be programmed to annoyingly 'pip' in the middle of the night, which these are guaranteed not to do. The Nest devices so far haven't had any false alarms due to steam from showers, which the old devices were sensitive to, I've tested them for this specifically. The night light function is really useful too.

These things are expensive when you compare them to a regular wired alarm, but they are good, and what price do you put on safety. Some of the features might seem a little gimmicky on first glance, but with young kids they are actually quite useful. Night lights to show the exits for instance, and voiced warnings before an alarm telling you of where the problem is, rather than all alarms going off and giving you no idea why or what’s happened. Also, with most other systems you can’t mix battery and wired alarms, so unless you get every location spot on when first installing cables, you can’t add any additional rooms at a later date, but with these all you need is either mains power, or batteries as they don’t require a signal cable between every alarm like others. They also perform their own periodic test so if you struggle to remember to do this yourself, you get a little chirp every now and then to tell you and a report in an app. Happy days.

2 new Nest protect units came to join an existing one. Setup was straight forward. You might want to consider taking a picture of the QR code and information on device before installing it on the ceiling. Note: Nest Protect can only join 2.4GHz WiFi network. Many years after setting up our first unit, Nest Protect is still the best product in its category.