Moen 920-004 Flo by Moen Smart Water Detector, 1-Pack

The setup was easy and it's showing me room humidity, room temperature and no leaks.

I purchased 4 of these devices: The first 2 paired without issue and appear to be working fine. The battery on the first one died within a few days, and the 2nd one lasted about 2 weeks before dying. These use CRA123 batteries which do not come cheap. I was never able to pair the 3rd one, no matter what I tried; it always failed once I connected to the wifi network. I tried adding the network manually, I tried resetting the router, I tried changing the AP name, I tried manually connecting to the network, every single attempt failed, and customer service is of absolutely no use. The 4th one paired, and despite having a brand new battery (not the one provided) it reported the battery at 43%. I took out the battery, and the app never informed me that the device was offline, I even waited 20 minutes to see, and still nothing, it was reporting the same 43% battery level and offline. Bottom line: I would not trust these things to alert me in case of a water leak. Given the cost of each device, I would have expected it work flawlessly, but I'll be returning them and going with either Honeywell or pretty much any other brand. If your devices all appear to be working, I highly recommend doing a test to see if they are reporting correctly, dip the sensor in water, try taking out the battery, and see if the app reports it.

Doesn’t work, I tried to returned but need to send to USA and costs a lot. Not compatible with app

No instructions re setting up in box. Finally got it working after search youtube. Stopped working when wifi ( as a result of nbn outage) and haven’t been about to get it going since. Assuming battery supplied was depleted and can’t make any further suggestions until I purchase a battery - not a common one you have around the house so buy a few for future replacement

I finally caved and got some "smart" sensors for my home after being away during a cold snap and being unsure of the condition of my house. Having your heat go out or an undetected water leak is awful so while these detectors are a little pricey, I think it's a worthwhile investment especially if you're away from home regularly. I will say that the setup app and pairing process was way fussier than it needs to be. I bought an ecobee thermostat and that was way easier to set up, and I had to wire that thing to a furnace. I consider myself very technically inclined and the amount of pairing errors I got trying to set up four of these things made for a nightmarish afternoon. This is a single-instance pain point, though, and ever since these things have just been quietly monitoring. Battery life seems great - virtually no change in the last three months - and it's nice that the app reports a more precise reading than just "good" or "low". The configurable alarms are nice too so that you don't get nuisance alerts for high humidity in a bathroom when someone takes a shower. It'd be nice if using the remote sensor didn't block the ability to use the base unit's sensors so you could monitor a wider area, but the cable on the remote sensor is long enough that you should be able to find a good monitoring position. Overall, I'd recommend these to pretty much everyone. The earlier you can respond to an emergency, the less damage you'll likely have to deal with.