Instruct: Classify Amazon reviews into positive or negative sentiment
Query: a tremendous mistake

The album is composed in two parts; at the arrive was new and unopened but:a) in the cd composed of 10 pieces only the first 8 was correctly recorded and the two last didn't sound;b) the dvd of the concert, completely wide and unrecorded.I must say that Amazon company has been very correct and gave me back the money but i think that the producer of the album should make more controls in merchandise produced.Regarding the music, for what i heard, is very nice and unique.Is unbelievable find 100 good trombones players in the same orchestra; the arrangements were very good.This is my opinion.Antonio Zucchi