Agreed on the rain sensor feedback being very lackluster. Once it rains and it skips a watering it will list the rain sensor as the reason but up until then there is no way to see it in action.
I tend to agree on the over watering comment. There was some feedback from a Wyze product manager to the tune of that being their approach. (link here → Wyze Sprinkler "Smart Schedule" Questionable) But I very much bought this unit to actually use less water 
So the biggest thing is to adjust the settings in your zones data to as close to realistic as possible. I found that hard to do in some of my zones due to difference in soil and/or crop type but got as close as I could. From there I let it run a few times and then just ended up making my own fixed schedules semi based on what the smart schedule did.