“Sills had a beautiful, silvery voice. In her prime, she displayed a wonderfully agile coloratura. But neither quality was one of a kind. There are many gorgeous voices out there today. And many more virtuosic ones. Sills was a good actress. Today in opera there are better, and certainly more daring, ones. Yet no one else sounded like Sills or had her stage presence. She was exactly right for her time, just as, say, the Beatles were for their time.”