There is a level of internal complexity implied within "it just works," and an added layer of frustration when someday down the line, it just doesn't work. Eventually an electronic component wears out, or the manufacturer shuts down their server, or your phone is no longer supported.

I have always loved the idea of a connected house, but I haven't yet seen a feature that would make it worth the trouble of installation, added cost, and yet another app to control my life.