The Kongsgaard Variations, the Arietta Quartet, was given its world premiere by the Prazak String Quartet. The work was commissioned by winemakers John and Maggy Kongsgaard. Like everything I've heard from Hillborg, it was an ear-opening journey. Through cello pizzicatos, neo-Baroque Scottish snaps, muted accelerandos, ethereal water-harmonicalike delicacies, a chorale, a satisfying segue into the Beethoven tune at the end, and a coda sealed with glissandi, I was entranced.

San Fransisco Classical Voice, November 28, 2006 - Jeff Dunn