I saw this sizzle board live in a blues setting, the cajon player used it to get sort of a snare/washboard sound and I found it fascinating. You can play it with one hand while using the other hand for a basic rhythm on the cajon. I love using it in home recordings or jamming. Very fun to play, all that time spent taping the fingers on my desk to the rhythm of music finally pays off.
However, in live settings, I feel like you would need to have a mic set up specially for it. You could potentially use a mic for both shaker and sizzle board, with some adjustments.