I’ve never had a problem with poor sound quality with a wireless lav mic.
I always listen to what I am recording with a good headset.
I keep fresh batteries in the transmitter and receiver.
There are LOTS of channels to pick from in the transmitters and receivers.
Best of all, you don’t need someone to operate a sound boom.
Shot guns work best when aimed at the mouth of the talent,
as close as possible without being in the shot. Not always an easy option on a one person shoot.
~ Allen