Like the film itself, this soundtrack won't be exactly what everybody will be expecting but, also like the film, it is likeable in a very clever way.
The music itself bounces about like a superball, ranging from techno-metal hybrids, to what could only be called some sort of American derivative of acid-funk. Everything is used, and to an absolute effect. However, effective as this may be, the wide range of beats and synths don't exactly help the album to gel seamlessly. As you listen to this, you'll be at a loss as to what cohesion is even there. But listen to it twice, and you'll agree that there is something present which allows the soundtrack to just flow the way it does. What this something is will, again, leave you perplexed to say the least.
In this sense, Fight Club is (almost mandatorily) comparable to The Chemical Brothers' Surrender, and let's face it, the no holds barred approach worked for them. And if it must be said that The Dust Brothers only just managed to get away with it, then it also must be said that they somehow managed it with more style than most could have.
Overall, this is murky and dark, and not the easiest ride to take. As well as it does befit the film, in employing The Dust Brothers something more professional sounding might have been expected. But to expect this is to miss the point, just as it would have been with the film. Like it as you liked the film, and you'll get along just fine. If you didn't like the film, well, that's your problem.