There was a thread on this when it came out:
http://www.thefret.net/showthread.ph...t-Loud-anyone?
I saw it. It was interesting. Page was awesome. I'm not a big fan of the Edge, but I can appreciate his contribution to pop music. I didn't like Jack White at all. He came across as kind of a tool (at least that was my impression.) I haven't heard any of his music, so I can't comment on that.
[spoiler]......
The high point of the documentary for me was when Page played the riff to "Whole Lotta Love." You could see the Edge and White were awestruck, and rightfully so.