Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great stuff

The most frustating thing about Helio Delmiro is the fact that, for some reason, he hasn't cut that many records by himself. I think he prefers to back up people the likes of Ella Fitzgerald.He is one of the best guitar players Brazil has produced, being able to jump from jazz to samba without any effort. His trade mark chords are unforgetable. Pure genius.I strongly recommend all of his records.