If you don't "get" Sigur Rós' music you might want to steer clear of this one, the rating I gave it reflects this, it would be much lower if you don't care for their style. There are some great, gritty visuals and the music is well played but it is very impressionistic, to the point of being fragmentary. I would recommend there film Heima for a better look at the band, with many of the same songs. This is the 'film noir' of rock music documentaries.

For anyone that's seen Heima, INNI is nothing like it. It's minimalistic, enchanting, a film of simple visuals with inserts from the band's past and it is all about the sound. I recommend seeing it at a theater on a big screen where you will feel like you're in the middle of the most spectacular concert. Your mind zooms out and the loud music takes you on a memory trip and rips your chest apart. It might not be for everyone but the lights and the images are so gripping they'll most probably send you into a trance. Those who won't like it won't finish watching it, however all the people at our theater had their eyes glued to the screen the whole time though. A beautifully done concert film in my opinion.