i have to say i really dig the app.. editing the right chords is awesome and simple using the quality button.. correcting basslines (as found on footprints) unfortunately doesn't seem possible.. this leads to my only real complaint: even after buying the jazz pack there are far too few beats and no hip beats of any kind.. afro jazz beats are a great idea but why is there only 1 in 12/8 ? how about several others including simple time? that goes for all catagories - there should be more and much hipper for each style.. and how bout some modern urban beats? jazz is no longer just simple swing ya know? just my 2 cents (sorry for the typos).. GREAT APP! please keep updating and expanding!