@ PhilH, Stanton, Bill San Antonio :
This film is an (unofficial) remake of a 1954 Henry Hathaway western, Garden of Evil, with Gary Cooper, Suasan Hayward and Ridchard Widmark, so it's no wonder that it a) has an unusual - for a SWs - happy ending and b) is completely different from Carnimeo's other movies.
I've seen the Hathaway film last year when visiting a Scottish collegue, who loves westerns as much as I do (the DVD is in the series Optimum Classic Westerns);
Despite its great cast, it's a mediocre western, just like this italian 'remake' (the indians of the original are obviously substituted by Mexicans).
I agree with most people here that it's an average SW, worth a look, but nothing special.
And I agree with Bill San Antonio about that saloon scene : it's brooding, sexy, wonderful ... the film is worth seeing for this scene alone.
@ Stanton alone now:
By any chanche, have you any idea where in Italy it was shot exactly?
I had the idea that a lot of scenes were shot south-west of Rome, in the direction of Ostia, but I'm not sure.