Love this thread!
I posted here about a year ago when I was just getting started. Now I've got most of my house automated the way I like it- all lights, ceiling fans, iRobot, security for the doors, and a bunch of things automated with sonoff switches. In fact, for me the simple sonoff switch is king!
I just automated my garage door with a simple $10 sonoff switch and a $20 door sensor. The door sensor (eWelink/Alexa compatible) I mounted on a door hinge attached to the garage door. When the door is down, the hinge keeps the magnet next to the door sensor. When open, the magnet swings away from the sensor. Alexa says "The Garage Door is Open/Closed" and reports the status when asked.
If the door is open any time between 9pm and 6am, it triggers two lamps to turn red. Make it impossible to forget the door open at night.
I setup the sonoff switch to respond on/off to "Alexa, open/close The Garage" and merely hooked it via a small bit of speaker wire to the door opener button connections. Works beautifully!
My house is pretty much as automated as I want it for now (going to add door locks and some cameras soon) but the thing that surprises me is I never needed another hub of any sort. When I didn't know any better, I bought a Philips Hue hub and the starter light for it- but they are the only things in the house that require a hub, and I see no damn reason for one. (Okay, granted- my ceiling fans required a Bond Hub to work, but that makes sense to me as they are very specific devices requiring RF control, whereas lights aren't.)
In my rooms where I have a mix of Hue lights and much cheaper non-hub lights, the non-hub lights are actually faster to respond. If I had it to do over again, I'd never have bought the Hue stuff.
We mainly control everything with Amazon Echo- one in the living room, one in the kitchen, one in the main bedroom. Recently as a fun side project, I turned my son's no-longer-used Raspberry Pi 3 into an Echo, so it covers my home office. I plugged in an expensive USB Blue Yeti mic for it- something you'd never just buy for this use, but I just happen to have one unused otherwise. It picks up even whispered Alexa commands.
WAF is 100%, and let's face it, that's what really counts.