Of Shafer's chamber music performances:
"Shafer played the difficult piano part [of the Strauss Violin Sonata] with notable aplomb and dexterity. The Debussy . . . was . . . elegantly recreated. It was an intelligent and well-played performance. The Stravinsky, in an alert, often humorous reading, showed both players well in command of their instruments and to have, furthermore, a goodly command of the stylistic vocabulary of this confection. The rhythms were bracing, the balances adroitly gauged, and there was more than a modicum of the grit and acerbity that this tongue-in-cheek material calls for. I look forward to more music-making from these serious . . . instrumentalists."
— Harris Goldsmith, New York Concert Review
"Their ensemble and balance were excellent. The Strauss had sweep and ardor and sounded beautiful."
— Edith Eisler, Strings Magazine
“In some ways the piano part of this work is technically more demanding than the violin part, and Mr. Shafer performed brilliantly, not just here but throughout the evening.”
— Don Morris, Bedford Gazette
Of Shafer's solo performances:
“Shafer, bringing a light, sure touch to the piano, showed why he frequently appears as concerto soloist with regional orchestras. His flawless performance was rewarded with heartfelt applause from the audience.”
— George C. Ford, Cedar Rapids Gazette
Shafer's performance of the Liszt B Minor Sonata possessed “. . . the expansiveness and ambition associated with the piano sonata since Beethoven extended its scope.” He was “. . . swept up in the controlled turmoil that galvanized the work several times before its hushed ending.” “His Scarlatti was clearly but never curtly articulated.”
— Jay Harvey, Indianapolis Star
In Shafer's performance of Beethoven's Emperor Concerto he ". . . asserted his mastery of the music and displayed his technique." ". . . an exuberant performance by Shafer. He met all of the challenges."
" . . . a remarkable talent."
— George Armstrong, Charleston Daily Mail