I had heard good things about Aqara products, and had high hopes for these Matter-compatible sensors. I bought five of them to cover all our external doors, along with the Aqara M3 hub. Unfortunately, for me, this was a poor decision. I have a fairly extensive home automation setup based on Apple Home, and am knowledgeable about tech, but these sensors did not play ball. Once I had set up the M3 hub and installed the Aqara app I start the process of adding the sensors through the app as child devices. All five failed - they would be recognised by the app, but when adding them to the hub I repeatedly received an "other error: code 1" message. While this was far from promising, I decided that I would bind the sensors through Apple Home directly after setting up the hub as a bridge. While the sensors would bind, some after a few attempts, they failed at their primary function of detecting the opening and closing of the doors. Of course I double checked that I had fitted them according to the instructions with the required distance between sensor and contacts. Both the sensors I fitted detected the door opening and closing a couple of times, but after that the status did not change, one stuck on closed and the other open. I did not fit all five sensors after this and continued to struggle with the two I had fitted. I removed them from Apple Home, factory reset the sensors and tried again. One sensor then wouldn't bind at all, failing multiple times. The other bound first time, but once again stopped sensing the movement of the door. Ultimately I gave up struggling and decided to return all my Aqara kit. Despite other good reviews my experience means that Aqara is now a brand I don't trust to perform as intended.
