It's true that, as with many movies from this era and style, you need to overlook the flawed soundtrack and, specifically, some awkward singing by Rocky Roberts during "Django" if you want to appreciate it. However, those minor issues are easily forgiven because the movie has a brisk pace and plenty of action sequences—a Gatling gun with an endless supply of ammunition stands out; beautiful but ultimately defenseless women appear throughout; and there's a sinister, silent antagonist. A coffin also makes an appearance somewhere. Franco Nero’s performance, highlighted by his striking blue eyes, is exceptional in this Corbucci film.

Source on TMDB