Yeah, it's awesome.
The thing is, you could legitimately just declare it one of greatest suspense thrillers ever made and call it a day. It's riveting stuff, and what film wouldn't be content with that label. But what really stays with you when you leave the theater are the philosophical meditations/probings. The film has an extremely existential perspective. All the choices/decisions the character make are really key (And Bardem definitely represents our awareness and anxiety of impending death/chaos. He's definitely not any kind of "rational" force in the world).