From the jazz-rock songwriting, not a 1-4-5 found on the entire album, to the phenomenal horn section charted by James Pankow, to the touching lyrics and angsty-feel 60's protest opinions, this is one of Chicago's best albums. There's a huge (not 'yuge') range of instrumentation and styles, from Debussy-esq, flute-infused Memories of Love to straight rockers such as 25-6-4, to bluesy-jazzy, horn-infused Movin' In/The Road, this album has it all. It is widely appreciated by people into music that tells stories, evokes feelings, and *progresses" into new musical territory.