It is working really well for me basically using your API as a push button trigger for Alexa routines. Nothing else off the shelf can do this… (unless I made it myself which is beyond my technical ability)
I often go away in my caravan and its such a pain to remember to turn devices off around the house. Now with this set up, I just make an entry in my caravan calendar and I can go away and the home will manage itself.
Each year we go on holiday. My family laugh at me as I go round checking everything is turned off. Since we got the smart home controller and the power plugs I only have to put it in the calendar and everything turns itself off and back on when we return.