First of all, congratulations to the film-makers for putting together such an interesting package. I would never have imagined that bringing Jimmy Page, the Edge and Jack White together would work, but it does. In this film, Page's guitar playing sticks mainly to the riffs that made his name. The Edge shows how he uses electronics to enhance his sound, essentially playing very simply, but enhancing everything with a huge box of tricks. I'm not sure if I like it, but it is a different approach to the other two. The person who fascinated me was Jack White. He talks about how he picks up old guitars in junk shops and finds a way of producing a unique sound from them. It's not the easiest way to go about guitar playing, but coupled with his very committed approach it works extremely well. The only other guitarist I have seen do the same thing is Elvis Costello. Of course, White is the only one of the three who is also a lead singer, and so inevitably this has an influence on his playing, although this is not touched on in the film.
However, truth be told I was a little disappointed with the film overall. To break it down to its bare bones, in essence the film is in two parts: one which goes back in time with each of the guitarists to look at how/why they started and do what they do; and the second part in which the three of them are together discussing guitar playing and jamming together. The look-back into the past was all very well, but for me there was just too much of it, and after a while I just got bored. On the other hand, the part when they were together was great, but there simply wasn't enough of it. I can only imagine that a huge part of this session was left on the cutting room floor when it should have formed the meat and potatoes of the film. A lost opportunity.
Having said that, the idea was great, and I'd love to see an 'It Might Get Loud 2', this time perhaps with Jeff Beck and a couple of other unexpected guests.