Time signatures are extremely limiting
I love just about everything about the app, but I find that only having 4/4, 3/4, and 6/8 as available time signatures is extremely limiting as to what I can actually use the app for. As soon as I have an idea in another time signature, I scrap whatever I was doing in GarageBand and move to a multi tracking app.
RedZeppelin10 about
GarageBand, v2.2.2