This soundtrack fits the film perfectly. I have heard it called depressing, but I think the tracks fit the tone of the film without being depressing at all. There are several standouts for me: Possibility, Slow Life, Meet me on the equinox and Satellite Heart bring to mind the heartache, whereas Friends, Monsters and I belong to you have more of an upbeat feel. Thom Yorke's Hearing Damage is probably the track of the album, rather like Paramore's Decode was the standout on the Twilight soundtrack.
I think a sign of a good soundtrack is when hearing the song immediately brings to mind the scene it came from in the film. These songs definitely do that. There isn't a bad song amongst them and although some of the artists are well known already, a lot of them I hadn't heard of. Will definitely be keeping an eye out for them now.