I had fond memories of this from the 1970's, although I hadn't actually heard it it in years; I got a copy mainly out of curiosity to see if it had weathered well, or sounded as embarrassing as so much avant garde material from that era usually does. Good news - Not only has much of it stood the test of time , it is literally hard to believe just how old this is - you have to double check the release date to convince yourself. On the good side - in many ways the original and the best, and manifestly the grandfather of much 'techno' from Germany or anywhere else, even though much of it does not rely on synthesisers or sequencers. What must have seemed quite 'difficult' in its day, in terms of minimalism and repetition is practically Top 20 stuff these days, so it is pretty accessible to the modern ear. Downside? - some of the more experimental stuff is just plain boring, and barely listenable, so not great value for money, and you'll find yourself just skipping past those tracks. Having said that, anyone who is the least bit interested in the history of modern music just has to have it - nuff said?