Probably the best opening scene ever. Followed immediately by another grab-you-by-the-gut scene.
I'd seen this twice before 30 years ago or more, and both times found it rather boring. This time however, I was mesmerized. It was probably pan and scan before. Plus I was just a young punk. I didn't remember anything except the opening scene, Claudia Cardinale in a bathtub with Charles Bronson walking around the room, and there was something about trains. I'm rather glad I didn't as it made the experience that much richer.
Beautiful scenery, beautiful closeups, great story, and patient pacing. The soundtrack is amazing and the sounds (boots walking across floors, windmills, coins, etc) add so much to the feel of the movie.
I wonder why Clint Eastwood didn't have the part of Harmonica, but I'm glad he didn't. Bronson is fantastic.