Try opening folders with large amounts of content, the thing just folds. If you change your mind and want to change the sample .......... GULP!!! be prepared for another lengthy loading spell.
Just sort it out, they have(drum roll) in version 7... (gasp) made some improvements, but its just not good enough on this point. Everything else is exceptional but they have for unknown reasons neglected this aspect of the application in favor of "woooooo" front of house stuff.