Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Seminal jazz-rock (seminal JAZZ; period).

This may well be a kind od sum of Burton quartet's RCA/Atlantic year. The beautiful, only official recording of this sadly underrated group, blending country-rockish and jazz sonorities. Great musicians deeply roted in jazz tradition for an airy, light and unique sound (the blending of vibraphone and electric guitar). Burton never did better and more personal music, in my humble opinion. A hidden classic.