I bought this on vinyl when it was first released in 1969.  The best song is still "Two Minutes Silence."  [Yes, it is two minutes of total silence.]  Bonus tracks add nothing to this experimental album.  It was painful to listen to thirty years ago; it's still painful today.  After listening to this you'll need to wash your ears out with John Lennon/Plastic Ono Band or Imagine.  This one is for completists only.