Insertion / Removal is very fast, plus the underlying data type is float, so you can reference it as a Buffer object which is required if you need to pass uniform arrays to OpenGL.
Performance wise it should not be a big difference to the MidiList, but depending on the use case, it's simpler to use.
And If you right click on it in the ScriptWatchTable, you will see a custom data inspector which is also helpful during debugging.