This has some interesting capabilities, but the big question is how well and how reliable? I've been doing a lot of smart home things recently, and the biggest

This has some interesting capabilities, but the big question is how well and how reliable? I've been doing a lot of smart home things recently, and the biggest issue you run into is reliability. The level of reliability you want with your home is much higher than a lot of general-computing tasks are up for. Having your lights work 95% of the time is fairly annoying. This device working off of AT&T's network, should presumably be fairly accurate if you have solid AT&T coverage. I find that home wifi networks are more prone to interface and intermittent operation than a good cellular network. Is the humidity sensor in this device from AT&T accurate? Will a command from this device to another system work 99.99% of the time? The other big issue, of course, is security. I couldn't find details about the level of security this comes baked in with.