Sonoff has a great quality product and one that I use frequently. I like the USB Smart Switch to use for LED lights and telling my tablet dashboard when to turn on and off. You can also set up the home assistant integration to use on WIFI so it’s not always going to the Cloud service.
One area where I get stuck when I go to add a new Sonoff switch is remembering what smart app I use to add it… The app that Sonoff uses is called eWeLink available on Apple (App Store Link) &
Android (Play Store Link).