It's very calming and trance inducing. I could imagine buying an album with a song like this.
I dunno though, it doesn't really go anywhere in terms of the music. I would imagine the section around 4:20 is where everything starts to build, but I don't feel as if it's really getting emotional enough so that when the singing ends you don't have a sense of melancholy and longing.
But I'm probably insane