They're all complete crap. I use Google Home to ONLY turn my lights on or off and it gets it like 60% of the time. Sometimes it accepts the command and it just doesn't even work and says something went wrong. Pressing the light button in the app is 100% consistent. Incredible.
I've been superstitiously switching between "turn the lights off" and "turn off the lights" (also with music). It seems like every few weeks or days it prefers one over the other.
I say to Siri “close the blinds” eyes and it replied “I don’t see anything like that in your home”. I say again five seconds later “close the blinds” and it closes the blinds.
I have the same problem with my “blinds” - I started calling them “shades” instead (not the usual term, in my vernacular at least) and have had much better luck. YMMV!
It's not a good reason but I believe this happens because voice command has to go to Google server, Google talk to light vendor API, light vendor communicates with your device, and lights go off only if all of this succeeds.
Meanwhile, button in vendor app will not use internet so lot less can go wrong.
