I do enjoy the app, but...
I think for the people who want to compose some orchestral style tracks, there should be at least a timpani drum that you can choose. Ive tried using the Chinese drum mixed with some others, but, it lacks the deepness of a timpani that you get in an actual orchestra. Overall, solid app, its just that I kind of want to be able to compose more authentic orchestral music is all.
Pandabora about
GarageBand, v2.2.1