It isn't really a full featured editor... TBH, I am a little confused as to the usefulness of the BK Partner app other than a good way to edit Performance lists. But you can't use it to CREATE full Performances, from what I can see.

One thing is IS useful for might be to add the 'Favorite Tones' feature from the BK-3, which hasn't made it to the BK-5's (or BK-7m's) OS yet. You can set up the ten buttons for Tone access to call up your ten most favorite sounds, no matter what Bank they are in. A handy feature, only on the BK-3 so far. But the iPad app can do it, so there's ONE live use for it, anyway!

There's a possibility that the hooks into the deeper OS features can't be addressed, but I don't know for sure. But as popular as these apps are, especially with younger buyers (mind you, how many youngsters are going the arranger route in preference over WS/Synth/Stage keyboards?) perhaps this is the way to bring them into the fold?

The Lyric Viewer app seems pretty handy, and may address some of the shortcoming in the way that PDF's are handled by the keyboard itself, and the Scale Editor seems a boon for those using it for Middle Eastern and other non-Western scale musics.

But all in all, I'm pretty disappointed in how little usefulness this Partner app has, so far. But with feedback from its customers, perhaps it can be addressed. I think we are all faced with budget arrangers with fewer and fewer actual buttons on them, as manufacturers look to cut costs, and many functions that used to be right there where you needed them get buried in menus. Here is the perfect opportunity to restore the full functionality without raising the cost of the arranger itself.

Let's hope they see it our way...