Just watched the movie again this past weekend with friends who hadn't seen it yet. They both agreed that they liked the movie very much but it was so different from past Bond movies. The consensus was that it was more of a "thriller" than a Bond action movie.
I felt that the soundtrack matched that movie style... it was more moody and electronic/orchestrated mix. There are several tracks where there is looping that builds and builds which are kind of catchy and several parts where added percussion sets it apart.
I quite like it, though not as much as Casino Royale.