One of Eastwood's top Westerns
This is superior to Eastwood's first two "Man with No Name" movies IMHO. While it's not technically as good as the renowned "The Good, the Bad and the Ugly," it has a more compelling story with better characters.
And that's the key to this movie's effectiveness: It focuses on the two protagonists and their developing relationship. Because we're interested in them we're more interested in the extraordinary events with which they're entangled.
Speaking of which, there's a nice buffet of Western staples: gunfights, an Indian attack, a saloon scene, a train wreck, a house of ill repute and a rollicking climax. MacLaine is young, beautiful and charismatic here. While she got along with Clint, she made a derogatory remark about his being a Republican. She increasingly became a LIEberal loon in years to come.
It runs 1 hour, 56 minutes, and was shot in Morelos, Sonora and Sierra Madre Occidental, Mexico.