Hmm - that's interesting. I've been looking at the Sonoff stuff since you posted this, thanks!
One of my goals is to have no Internet connectivity to my devices, and it looks like there are some firmware options that would let me achieve that. So that's a plus.
The minus so far is that I can't find anything about range extenders / relay (signal, not power) for these. Two of my early use cases are out of WiFi range, so I'd like to be able to have something between the shed and the controller that acts as a relay. One of the things that attracted me to MySensors is that nodes can act as relays for other nodes.
Do you know if that's possible with Sonoff ?