Well, i've only seen a few Makaveyev films but i thought it was clearly the most accomplished; i think it's stood the test of time a little better than WR:Mysteries of the Organism, which is probably his most famous. It's interesting for its fluent combination of fiction, newsreels and a range of material, and its intelligent analysis of sexuality and politics- which i'm sure would repay extra viewings. It's also (typically) quite playful and erotic in an understated way, not some dry intellectual exercise.