It's a powerhouse, for sure. Watched it years ago on a worn VHS with less-than-ideal subtitles. Thought it was good if a bit confusing. Then I watched a new print in Bristol two-three years ago, at a film festival with all manners of historians and academics attending, lots of introductions/Q&As, etc. That was the point it really took off for me. One of those screenings I'll never forget.