Westdeutsche Allgemeine Zeitung:
“… Schettki doesn’t put himself or his virtuosity into the center, but the whole act. He serves the music ...”
Buersche Zeitung:
“… let colour spectrums blossom emphatic with velvety effect. Transparency, Clearness and colourful sounding variegate."
Westdeutsche Allgemeine Zeitung:
“… Schettki devotes himself to the tradition of this instrument, which’s soul he illuminates. He is an artist who withdraws himself completely opposite to the act. He abstains from the soloistic vanities."