Much of the album is the two men together - their voices (Louris up high and Olson on the bottom) and their acoustic guitars. They blend so well together that you can just get wrapped up in the sound. That's helped, of course, by a keen sense of melody and the construction of the songs. I don't think any of the songs will strike a person as one of the best they've ever heard but they are all candidates to get stuck in your head. There are subtleties to the music as well and other instruments (notably organ, harmonica, and electric guitar) contribute to the whole. It's a cohesive album in the best sense and one of my favorites of the year. I hope they keep making music together.