Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Nothing much to do with the band, but everything by music critics.

Not much useful bnits of knowledge contained here except near the end when this very tiresome DVD FINALLY gets around to actually discussing the songs on the album. I didn't know half of them were from previous recording all the way back to Zeppelin III. Only 8 songs of this double recording were NEW songs. Also on a positive bit - you see the tuning and exactly how the riffs for several songs are played by one of the engineers that worked on the album. Special tunings used like DADGAD for Kashmir. Otherwise, this is VERY long and tireseome in my opinion and NOT worth the price of more than $20.00!!