The bonus discs from the yet-again-remastered Led Zeppelin I and II. And am not too impressed.
The bonus disc for Zep1 is a 1969 concert and it is good, but the band is not at their peak yet and it is a shadow compared to the live music on How the West was Won (one of the best live CDs ever).
The bonus material for Zep2 is mostly different versions of the stuff that is on the released album plus a new instrumental. Led Zeppelin II is one of my favorite albums but hearing the outtakes does not do much for me.
A similar set was released for Led Zeppelin III, but I am less a fan of that album.
While I long loved Led Zeppelin II, I had forgotten just how good Zeppelin I is.
It seems Jimmy Page is remastering the Zeppelin catalog on a constant basis and regularly re-re-re-releasing material. I wish someone would do that with the Police once since Message in the Box came out decades ago.