50th anniversary edition of 1500 individually numbered copies on translucent blue & red marbled 180-gram audiophile vinyl. Weather Report was one of the most influential jazz-fusion groups of their era and outlasted many of it's contemporaries such as Herbie Hancock's Headhunters and The Mahavishnu Orchestra. Despite many personnel changes over it's 16-year lifespan, they continued to create groundbreaking music under the guidance of Joe Zawinul. The album is their first one that predominantly uses electric bass and incorporates uses of funk, R&B grooves, and rock. It would later on be labeled as the band's "signature" sound. The album was voted album of the year by the readers of Downbeat for 1974, garnered a five-star review and peaked at #2 on the Billboard Jazz Albums chart.