All I can say is if like me you'd bought Energenie MiHomes, you'd have spent half as much working out that you need to think twice becase there are so many bugs that make them not worth using... I seldom hear success stories from us early adopters with smarthome things.

I also have two Nests. Stringify has now shut down (and was buggy/difficult to use), and IFTTT is now losing access to Nest it seems, so I guess that's a real knockback of at least several years for smarthome.

Even when it was all in theory working, the most simple thing was not actually possible - Nest shows you humidity, so when humidity is over 60%, turn on the dehumidifier (I have one upstairs, one downstairs). Such a simple task coudln't be achieved because of about individual problems, and this to me puts the date of solving it back quite a way.