Roberts Kulenko’s review published on Letterboxd:
Even though the opening credits list Tonino Valerii as a sole director, there were never any doubts that Sergio Leone contributed in a big way. After all, it was his idea and the movie more than often feels like one of his spaghetti westerns, but you might be surprised to learn which scenes he actually directed.
Made at a time when comedy westerns were the only popular ones in spaghetti genre. Serious westerns were out of fashion. The story mirrors that with a silly young hotshot taking over an ageing gunslinger who just wants to retire. It's got serious stuff in it, but also silly stuff. You might think Leone has something to do with serious stuff. Nope! He directed the films biggest gags and personally, I think they hurt the movie, because none of the gags are funny.