Renoir was undoubtedly a great director but what is often overlooked here is his accessible and light acting as the affable oath. It's so warm and inviting it would be easy to overlook the film's class baiting bite.
Evidently studio bosses were none too pleased with Steiger's unflattering portrayal. It was certainly a long time before they ever let Jack Palance be the good guy again. Stagey but with good dialog and performances.
Curtis without his affectations or togas has to work hard the whole movie long and is surprisingly excellent. Lancaster is gravitas glorious. The unsung third character is '50s NYC at night. It's a zoo and the animals need feeding.
Douglas is precisely cast as a ruthless egomaniac, just like his real life character if the film bios I've read are to be believed. This is a shrewd film, lacking the typical '50s Hollywood sentimentality. As relevant now, as ever.