that album is mixed in a way that makes it kind of subdued and lethargic, plus glen may is one of the most amazing metal vocalists ever (seriously approaches top 10 for me) and he's almost completely suffocated by that maelstrom of guitar noise. it's a fucking shame because, aside from a couple of more stadiumy mediocrities, it's essentially HEAVY METAL MANIAC, SHOW NO MERCY and venom filtered through manowar+bathory; executed properly it would've been some of the meatiest, stormiest metal ever recorded.
the previous album is about the same level, but the title track is probably their best song: