What a coincidence, I just watched it the other day, and now I run across this thread.

I watched it at the recommendation of a friend of mine. In a nutshell: I loved the interviews with The Man himself, and I hated nearly all of the performances, with the stand-outs being Nick Cave faking his way through "Suzanne" (it sounded like he didn't know the words, and he was so far off sometimes, I'm honestly surprised it was included) and Rufus Wainwright's godawful version of "Hallelujah." This one was so bad, I turned on the commentary to see if the director had an excuse for leaving it in, and to my surprise, she said it was better than Jeff Buckley's version.

The songs are great, but while there were one or two good performances, it was largely not worth watching. Hell, I was surprised that Cohen liked Wainwright's singing, because to be honest, Rufus Wainwright didn't have a single good moment on the entire DVD. I really enjoyed the performance of "Tower of Song" with Cohen and U2, though. Without a doubt, it was the best part.

In conclusion, I think the people involved were all on crack. If they'd included some decent singers (Bono was hands down the best singer, which says something), I would have enjoyed it much more. As it stands, I recommend watching it and fast-forwarding though the stuff that doesn't include Cohen himself.