Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Kempff at his best

This set is a magical match of performer, conductor, and orchestra. Early 50's Kempff at his best with the Berlin Philharmonic under van Kampen, all in excellent sound. These readings are both lyrical and powerful at the same time. Kempff was always a wonderfully lyrical player, but here he is also powerful--witness his mind boggling performance of the Emperor. Also of note are Kempff's wonderful cadenzas throughout the set. A desert island set of the Beethoven concertos.