I must begin by saying I am a bit "attention deficit" and that I never thought I would like subtitles, but this film flows through its long length with such adventure that I don't see how anyone can keep from being entranced with every second.
And it takes a lot to hold my interest.
In case you haven't heard, this "magnificent seven samurai" so to speak, are enlisted one by one to aid a village beset by 40 bandits.
What is often lost is that the story is really "Four villagers". Two are village elders (although not as old as the "grandpa" character they look to for advice). One, Manzo, represents the conservative element that in our era might be called "Republican", and the other, Mosuke, represents the liberal or "Democrat" policy. The other two are Yohei, a man full of fear who thinks Manzo's policies will protect him; and Rikiki, the boldest villager who is more in tune with Mosuke. Indeed, Rikiki might qualify as the "eighth samurai" as the film progresses.
There are so many wonderful subplots and so muuch excitement even when there is no action, that there's never a dull moment. 
The samurai also have their ups and downs. Toshiro Mifune is not the leader, but he is the soul. He is much like Rikiki. 
There is humor throughout that is perfectly timed, and much tragedy. I think it is Kurosawa's masterpiece, and he is one of the most respected directors of all time.