I agree-- I've watched 1-4 now (all the scenes, not just the DT scenes), and the music feels weird most of the time. Out of place. I do think in a few instances it worked, especially with the main character. Two that come to mind are the opening song in episode 2 and the song that has the main character and DT watching an imagined strip show for the wife. Other than that the music just seemed to get in the way.

Do you have episodes 5 and 6? I lost all my eps and those were the ones I hadn't watched yet.