Instruct: Classify a given review as either positive or negative.
Query: Absolutely dreadful

I don't understand why anyone would get so wound up about the mastering of this. It was terrible when it was released, now it sounds terrible & dated. If you want good prog rock, get some Can, Neu, or Faust, if you want experimental rock that has intelligent lyrics, buy some Zappa. If on the other hand, you have some terrorists locked up & need to play something to torture them with, this will do quite well, prog rock for people with no musical sensibility or intelligence.