"Zelek, a consummate artist...has the ability to make the 2-manual Aeolian-Skinner Opus 963 organ, installed in 1937, overcome both its venerability and vulnerability in a beautiful performance of carefully selected music."
"Zelek was physically animated throughout the performance. His hands flew across three levels of keyboards while his feet worked the pedalboard like somebody playing Dance Dance Revolution in an arcade."
"...Greg Zelek, the symphony's organist, playing the Overture Concert Organ and he figuratively blew the place apart . . . He's good. He's really, really good."
"Effortless facility on the instrument."
"Organist Greg Zelek, young and handsome, never needed the aide of any sheet music."
"Especially impressive was how he managed to so effectively hold together and 'sell' the extensive and complex Reubke Sonata on the 94th Psalm."
"When it is played as well as Greg Zelek in the MSO’s second number of the night, “Toccata Festiva for Organ and Orchestra” by Samuel Barber, it proves just as aurally stunning as it is visually."
"Zelek, not surprisingly, was the master of all required of him, including an extended section for just the pedals."
"At age 26, Zelek is quite extraordinary in the classical music world."
"Seeing and hearing Zelek in action helps explain why praise follows the organist everywhere."
"The virtuosic Zelek is simply so good that he managed to turn a second-rate piece by Samuel Barber into a first-rate crowd-pleaser that brought huge applause and a long standing ovation, then an encore and another standing ovation."
"Obviously, Greg has the musical gene!"
"Zelek is a performer who truly becomes 'one with the organ' during his performances. Even when the recital was finished, the audience demanded more."
"Gregory Zelek’s commentaries between the pieces were humorous (entertaining to catch the listener) and educational. Many of his comments are now permanently stuck in my head, and I can’t get them out."