“Karst, from day 1, has been nothing less than a patient, caring, knowledgeable and fun teacher, always giving us consistent and useful feedback, making sure we all do understand the materials taught during lesson to the best possible extent, while having a fun time. His lessons are one of the few that I actually look forward to having, and I feel like he has done his job fantastically as a musician and a teacher”

“De Jong demonstrates his in-depth knowledge of musical styles, and repeatedly lets us hear the logic of improvisation, as well as the phenomenal technical command and speed of thought which are needed to maintain this logic. These improvisations suggest how the great masters may have written their compositions: not out of nowhere, but while playing and experimenting with the musical material.”