The concerts of the Cuarteto Quiroga in the Heidelberger Frühling were praised by audiences and critics. The Quiroga performed works by Haydn, Mendelssohn, Sollima, Arriaga, Respighi with countertenor Jake Arditti and collaborated with Professor Valentin Erben (Alban Berg Quartett) in his lecture on Schubert's writing and reading. Check some of the critiques here (in german).