Oh, this is just SOOOOoooooo good. If you are into the history of American music, the Sun Records chapter is worth exploring further. Before the rest of the country made distinctions between rock, pop, country, and whatever else, Sam Phillips was just recording what he knew to be good music. This collection shows Johnny Cash before (too many) drugs, before Vegas, before TV, before prison: it is a simpler, sparser Cash, but with no less the intensity and fire. The version of "Folsom Prison Blues" is iconic.