If you are putting on live events and need instant cueing of music and sound effects, this app isnt just worth the coat of the app, but worth the cost of an iPad and the app.
This app replaces my old school $3000 Instant Replay 360" and works a heck of a lot easier than than machine ever did. I give this my highest recommendation.
That being said, I wish it could use songs from your iTunes library, but I understand this to be an Apple issue, not the programmers.
Hypnotic1 about Sound Byte Cart Machine App