I'm not new, neither for the smart home, nor for the homekit, because I worked smartthings for 5 years, I live in the security of the house for 3 and I played with the homekit. But I've never relied heavily on HomeKit, as I will now: I'm switching from SmartThings now and I've removed everything. My setup is small and simple: * 3 or 4 window / door sensors * 1 or 2 temperature / humidity sensors * 1 siren / alarm * 1-4 cameras I currently have an Apple TV HD as a hub. I also have some cameras and light bulbs on Wyze and I might change them later, but now I'm not a priority and I don't mind using Wyze. I have already ordered both an Aqara M2 hub and sensors and I have already installed 2 Onvis Bluetooth sensors. I'm trying to figure out which will be more stable. The key for me is that I'm in a house I've been away from for months. It has to be reliable, because I won't be there to restart things. I had a homekit system with smart light bulbs (wifi) and tinted lights (with attic) in a different house, which were solid. The first day I set up the Onvis sensors, I updated the firmware of one and it gave me the "no response" error. A full reset made it run again, but this, combined with the slow response time in the app, made me nervous - from where I ordered the aqara stuff I hadn't set up yet. I also only realized later that my Apple TV is old and Bluetooth 4.0, not 5.0, so it could have been the cause of the Onvis problems. I also have a simple siren connected to a smart switch; I can use this for my remote siren to scare off intruders - that is, if I don't keep the Onvis sensors, which already have a built-in siren. I have a eufy camera setup that looks great, I could add more. My main question comes down to this: 1. ** I should keep the Onvis Bluetooth sensors and, if so, I should update my hub to a new Apple TV or homepod mini so that I have Bluetooth 5.0 and can I make the larger range reliable? ** 2. ** Or should I replace Onvis with the Aqara hub and sensors? ** ** To repeat: my main value to decide is the overall reliability; I want to be able to leave the house for several weeks in a row and not worry about losing access. ** By the way, the house is small (less than 1300 feet on 3 floors), and the wifi network is up to date and reliable (Aruba Instant On).