Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Essencial Rigoletto

If someone wants to know what opera is about, then this is the first one to hear.Rigoletto is a very beautiful opera, with a wonderful story.First we have Milnes as Rigoletto. He is in top form and makes us fill his sadness and the terrible "Malidicione".Pavarotti is my favorite "Duca". The high D at the end of "Possente Amor" makes me think how can he goes so high.The point of discussion in many of the reviews is Dame Joan Sutherland's Gilda. Sutherland is a "big girl" with a supreme voice and the best technique ever, and Gilda is a delicate young girl. Of course Callas fans allways put down Sutherland, and vice-versa. So Sutherland has the voice and Callas the acting skills. I personly prefer Sutherland's Gilda over Callas, but thats only my opinion. I think them both deserve the Voice of XX century title.