4.3 - More introspective and measured than other Led Zeppelin I've listened to. Also, at 90 minutes, it's among their most expansive. One of my favorite Zepp songs is on here, "Kashmir." The middle of the record is a snoozer, with "In the Light", "Bron-Yr-Aur" and "Down by the Seaside", which are meandering proggy explorations. The last quarter features some rootsy acoustic blues, which showcase the band's incredible range and versatility.