I just got my GB today and spent most of the day playing with. I was really looking forward to it and quite optimistic I was going to like it. But it exceeds my expectations. A couple of features I really like are the loop editing (as well as repeat, the trimming tool is excellent) Also I like the effects. As I like heavier music, I was impressed to find I could apply any of the effects to a audio loop. Hence I took something like any of the Folk Mandolin loops and applied the Crunchy Drums effect. Sound's pretty good if you like your music with an edge! I guess it's more flexible than I expected and the loops are better than Steve & John showed. I guess I'm used to these apps creating something that sounds electronic - good for dance genres, but not for rock. GarageBand rocks! Well done Apple!