This album should be pretty pleasing to most Metallica fans I think. Best album on first proper listen to Black and probably would have been the perfect follow up. They touch on all their styles (bar, thankfully, St Anger) - there's riffs on this album that could comfortably fit of Ride The Lightning, and plenty that could have found themselves on Load as well. It has the deep "dark" sound of Black woven right throughout, there's heavy stuff that wouldn't be out of place on Master and technical sounds that hark back to And Justice. Well done Metallica... worth the wait.