Bought a Grand Illusions 30 note music box. Here are some major tips if you want it to work:
1. The notes printed on their strips of paper don't correspond to real notes in the real world. They actually say this in the description, but I forgot I read this and then spent days figuring out how their printed notes = real notes. Here's what they say "The notes that are marked on the paper strip, ie G, A, C, are NOT the notes that the music box actually plays, if you compare it with the notes on a piano. So the line marked F# on the music box plays back as a B, G# plays as a C#, etc."
2. If you have the same note repeated more than once (lets say your music has two A notes in a row), that means the prong that came up through the first hole will skip the second hole. It needs a certain width to work, so I found I needed to space the two holes out by one line. Punched hole, space, punched hole. So if you want your music accurate to some sort of tempo, you really need to space EVERYTHING out accordingly (like double spacing an entire paragraph).
Overall, the hardware was great though! Good paper, good machine.