I have only used them in plays (I have a pretty good story on that) but we have discussed getting a set for Roll & Go. We do not have particularly good mike habits and these would solve a wide range of those problems. Plus, only one of us plays a whistle and almost never as part of the performance (It acts as his pitch pipe and intro music).

One of our number is concerned about the audiences hearing all the little aside remarks and comments but you can put your hand over the mike and muuffle it for those.