i picked this up on casset in 86-87 this was mind blowing not the fastest or heavest but very hard and pure metal.at the time i thought america was the only place thrash/speed metal grew from but then i heard helloween,kreator,celtic frost and then coronor.these were some of the best, many liked sodom and artillery very good but not my style really but helloween had a fury at this time that american kids could relate to until the keepers of the 7 keys cds which are great euro power metal maiden style cd but this cd esspecially this 2 cds set will live in my heart as top knotch german thrash metal greatest song(timelessly relavant today)!