tempting to call this the best led zep album because of since ive been loving you and friends. both are the band at their best but something like immigrant song is them at their worst - riff, screaming, section a into section b, the nerdiest lamest lyrics from guys trying to look oh so cool. an important step in their discography as they showed they weren't afraid to go acoustic/soft - imo this is where their strength really lies, on IV going to california is miles better than rock and roll.