Lol....I installed one on my boat last week and have only been out with it once. It did seem that the longer I stayed on a top that the bite continued steady, when I could tell from the side imaging there weren't many crappie there to begin with.
I set it on passive shad and probably 30% of the volume.
It will mask the sound of the trolling motor, boat noise, and depth finder pinging for sure. Will let you know more as I experiment with it.
I thought I wanted a career! Turns out I just wanted pay checks!