As title says, sounds are good, its great to bring just my fav keyboard and my iPhone as my ivory piano sound source to a jazz gig. Yes its a pricy app,but much cheaper than buying a whole digi stage piano. And you can use iPad / iPhone for other purposes too, if you did not have one already.
Sheet/set list manager is too simple to be ready with just this one app for the whole gig, though.
It shows only one page at a time, and it does not allow rotating the iPad to portait mode, to make full use of the screen of my iPad pro ;-( so what you see is just one page (instead of two next to eachother) displayed half the size possible, or you can zoom in by pinch gesture, but then you see just half of page and need to scroll by whiping.
Positive to sheet manager is that it does not take only pdf, but also jpg or pics you made by the device itself, while most of other sheet managers take pdf only.
Hooefully Korg will improve this soon, to make it my go-to gig app!