No. I don't want microwaves spewing about my house.
The likelihood of someone trying to see inside your home using your wifi bouncing around is close to nil. The technology to do that is still in it's infancy and does not give very good results. It is still something to keep an eye on though.
I am learning a few nuances to the voice commands. While you have some leeway on how you make commands it is in one's favor to be more diligent in your specifications. Case in point.... I intended to command "Master Bedroom Lights" to warm white. I left out the "lights". Command confirmation was "setting temperature to warm". I walked down the hall and the thermostat was set on 80°. I then said "set thermostat to 74°, confirmation was, "temperature set to 74°". The I made the correct command, "set Master Bedroom lights to warm white".
It just takes a little getting used to. As the house is finished up I will have the other items connected and active. Then we will see if I still have a full head of hair in a month or two.
