Too bad, because after "Back In Black" is nothing more amazing come (only one firecracker except per album) ... As only the first track is good, but all other only average ... That's AC / DC only because the so-called, but not much for doing good music deliver. The short playing time is probably because more tracks would have been worse and I think that knowing these old men ... at some point you have to retire and give it that air is out ...!