I originally purchased this in 1986 (on cassette) and was totally blown away by it. I mean, up until then I was into Sabbath, Maiden, etc. but had never heard anything this RAW or EVIL (at least to a 13yr old!) It does include most of the classics (the songs Black Metal and Witching Hour on here totally rip). When I heard this I could never look at Ozzy or Maiden the same because where musically they were much more profecient, in the end they (especially Ozzy) stayed within the bounds set by the Judeo / Xtian framewok. As where Ozzy would sing about running from Satan, Venom would sing about sitting at "Lord Satan's Left Hand"...
But, as time would have it, Venom turned out to be phoney as well. But I can at least appreciate the fact that they did use Satanic imagery and didn't apologize for it.
As to this particualar album, if you're looking for a place to begin with Venom, I would agree with others that you should start with Black Metal (or Welcome to Hell). It seems to me that in the process of putting this album on to cd something was lost, as the mastering here doesn't have the punch that the cassette did (it's usually the other way around). In fact, I would probably give this 4 stars if it weren't for the mastering.
If, despite this flaw, you do want to hear even rawer metal than what Venom are traditionally known for, then I would suggest this. And if you do get this...PLAY IT LOUD!
Anyway, Hail Venom! Stay Evil!