The film knows exactly what it's audience would like to see, but what it's withholding is integral to it's statement. This can be a difficult pill to swallow as it forgoes many of the simple pleasures of a conventional movie, testing both your patience and suspension of disbelief in the process.
It makes a group of terrorists into the central protagonists, but makes no attempt to offer any explanation for their actions. You keep waiting for a big reveal that will make it all seem justified, but it's absence leaves the film in a moral purgatory.
They come together to stage their attack in an almost heist movie like fashion, without any of the flair of say, Oceans 11. Then they retreat to a mall, which functions artistically to highlight the consumerist hypocrisy of our would be anarchists, but also makes absolutely no sense to the literal narrative, as it's clearly a terrible hiding place.
The pacing is deliberately slow, encouraging the audience to read between the lines of the minutia, though it does occasionally pick up at points. While it does seem to succeed at it's own intentions, it's impenetrable minimalism will probably alienate all but the most tolerant film buffs.
