I'm kind of disappointed by the fact that you can't do harmonies online. Since I'll only be playing by myself most of the time or with people who have no interest in the Beatles.
I hope they'll add that ability online. Since, it won't be impossible to do. But I guess if they decided to not do it on disc they won't. Oh, well.
It's just a letdown for me since I probably won't use harmonies offline.