Clint Mansell, who you may know from his involvement with the soundtracks for Pi and Requiem for a Dream is also behind this (obviously) little known gem.
But perhaps gem is an understatement, it's a diamond and considering that I held reservations due to Katie Holmes' "singing" (she provides a series of tonal 'aaah's and 'laaa's, nothing spectacular on her part) - it all the more deserves to be referred to as such.
The score is fantastic, as to be expected. Mansell's previous work started on a good foot with Pi and took a good mile leap into the realm of 'amazing' with Requiem For a Dream. This soundtrack further solidifies the idea that there is more to Mansell than being the self-confessed founder of Greboism.