“Working with Stewart has been an incredible help to me vocally and musically”

— Carolyn Grace James (Vienna State Opera, Metropolitan Opera, Cologne City Opera, Paris Bastille, Brussels Monnaie)

“The coach of my dreams !”

— Anne Schwanewilms (Royal Opera House, Covent Garden, Berlin State Opera, Bayreuther Festspiele, Semperoper Dresden, Lincoln Center, Chicago Lyric Opera)