I have been following the Sonoff devices ever since they released the original 10 amp 2 wire wifi relay several months back. Itead, the company behind Sonoff’s stuff, has gotten quite the reputation in the hacker community for making low cost devices that are easily updated with custom firmware. There are several Sonoff devices that I have merely taken out of the shipping box, tore open, and began to tinker with before even testing the Itead firmware. That’s how community friendly they are.
The Sonoff TH, I believe, is a great product to add temperature sensing to multiple rooms in your home. The fact that it has a low price tag makes a whole home deployment much more palatable. Other than that, how does the Sonoff TH stack up against the rest?