People who care about grandiloquent visuals yet a controlled palette accentuated by the immemorable use of sound -- or, in one major battle scene, the absence of the sounds of the battle, the horrors of war somehow magnified by the silent screams and the unheard bullets, only the quietly mournful dissonance of the haunting background score to be heard.
Castle gates close with resounding, hollow booms, shutting people out, shutting people in. A crescendo of cicadas. And the final anguished shriek of a flute lending a much more effective voice to the great tragedy that has been played out than closing words might have done.
If you're expecting flaming Gladiator-type fight scenes or Samurai action, you may be disappointed. That said, the battle scenes are magnum opus if you know how to appreciate visual splendor. The screenplay may be relaxed overall, sure, it takes a while to unfold a tale of filial destruction ("King Lear" adaptation) but when the forts crumble and arrows fly asunder, the pace of the film is unbridled.
Whether you're a film philistine or a major Kurosawa buff or simply someone who relishes tastefully done cinema, this is absolutely worth the ride. I highly recommend this as a rental, but the discerning types may also want to add it to their collections. It's among Kurosawa's best.