Instruct: Classify Amazon reviews into positive or negative sentiment
Query: G&S traditionalists should keep off King's Singers versions

The King's Singers have released a Gilbert and Sullivan compilation. This is good news to some fans, but it is (partly) not good news to traditionalists. Most of the numbers are done a cappella but in "Ghost's High Noon," "Ah, Leave Me Not," "With Catlike Tread" and "Pirate King" they have taken a considerable amount of liberty with the original, especially in "With Catlike Tread" (from Pirates of Penzance). Traditionalists should keep off that track because the accompaniment doesn't follow the original version. The medleys are very innovative. The recording dating from 1993 is splendid.