You can now download an update for iTunes 11, which improves the speed of syncing big playlists, and adds a Composers view to your media library.
iTunes 11.0.2 also fixes a problem some people had with purchases not appearing in their library. If you want to view your library by Composer, click Songs, then right click, and you’ll have the option of adding the Composer filter.
iTunes 11 was a welcome refresh for Apple’s media player, with a much cleaner interface and more modern design in general. Some people still believe it’s too resource heavy, but it’s hard to find a better, more complete application for your media library.