All the accoutrements of this elegant modern bluegrass-styled music - most notably, Krauss's voice - taken together make for a really nice sound, guitar and Dobro more prominent than banjo, fiddle or mandolin. There's a pleasant airiness to proceedings (especially on songs like "The Lucky One" and "New Favorite", not coincidentally two which I already knew), with neither the 'mountain' nor 'melancholy' (obviously not opposed to each other) aspects of these stylings pushed too strongly, and the record hangs together well. Still, I haven't yet taken this one to heart - maybe that'll come with time, or maybe it's a function of my approaching it from the pop end of the spectrum rather than the bluegrass/folk. That said, I'm writing this after less than a day of repeat playing, and have probably spun it about a half dozen times already, liking it a tiny bit more each time, so who knows?
Minutiae: (1) Amusingly, I found it in the 'jazz' section at the library (and labelled as such); and (2) the title track was written by Gillian Welch and David Rawlings.