"Yoo Sun also possesses a rare communicative gift as a singer that reflects her generous spirit, humanity, and undying focus and intensity to excellence, all admirable qualities which are infectious to the community of peers that she encounters. "
Dr. Barrington Coleman, Associate Professor of Voice,
University of Illinois at Urbana-Champaign School of Music
"Her singing is equally convincing in Baroque operas or nineteenth century lieder as it is in performing experimental compositions involving extended vocal techniques.
She is industrious, works hard, and has a good sense of humor complementing a pleasant personalty."
Dr. Sever Tipei, Professor of Composition and Theory, UIUC
"Dr. Na is a specialist in a very important emerging field of contemporary concert music, which is the blending of Asian European, and American musical traditions."
Rudolf Haken, Associate Professor of Viola, UIUC
"Yoo Sun Na handled with strong singing and acting the complex role of Diana…"
from John Frayne, News-Gazette, IL
"Yoo Sun Na has very unique and rich sound. Her sound is so touching to people. She performs with sincere her hearts."
from Eumak Journal, Korean Music Magazine