"Nothing here quite seems like a radical departure from the finished album -- nothing is embryonic, where only the barest outline can be detected; Waters had a sturdy structure for the songs at the very beginning -- but hearing this evolution in microcosm is fascinating: few albums are ever as lavishly and carefully produced as The Wall, and by going through this "Work in Progress," it becomes clear just how much labor Floyd and producer Bob Ezrin exerted on the finished album"