"Because of her exceptionally high level of musical skills, I immediately suspected that Margaret O'Connell had a background as an instrumentalist . . . she sang the first of my 'Mirabai Songs' with a confident presence that made her performance memorable. Anyone seeking a real musician-singer, that rare bird, will be well advised to offer her opportunities."
- John Harbison, Pulitzer Prize-winning Composer
"Margaret O'Connell is the superb mezzo who handles [the complex atonal cycle Traveling West] with seeming ease."
- Fanfare Magazine
"Margaret O'Connell appeared as the Muse and Nicklausse, companion to Hoffmann. Her exquisite singing of 'La verité, dit-on' in the prologue was inspiring. O'Connell has a rich and mellow mezzo voice and fine acting skills. Her moving recitation in the epilogue 'Moi, la fidèle amie' touched the heart."
- Nino Pantano - Brooklyn Daily Eagle
"[In the] double role of the Muse/Nicklausse, Margaret O'Connell was exceptional, handling the gender-bending of the part convincingly and engaging in a lush, sensual 'Barcarolle.'"
- Paul Pelkonen - Superconductor
"Margaret O'Connell as Florence Pike . . . soared into the upper ranges and carried the comic element well."
- Princeton Town Topics