𝐏𝐚𝐨𝐥𝐨 𝐌𝐚𝐜𝐆𝐮𝐟𝐟𝐢𝐧’s review published on Letterboxd:
The Apartment is a masterful tragicomic comedy that tells what happens in the business world when one has the habit of lending one's apartment to superiors as a garçonnière. Billy Wilder continues here his merciless analysis of the degeneration of the American Way of Life, with the sublime sarcasm that has always distinguished him. The society he portrays is devoted to the most unbridled capitalism, and is studded with characters who are divided between those who abuse their power over others and those who allow them to be abused for personal gain. A society in which hypocrisy and meanness thrive, and where there is no scruple of constantly passing for what one is not. Within this community, personal success passes through the most vulgar careerism and the unscrupulous use of lies. What Wilder holds up to ridicule is a world made up of manipulations and distortions in which everyone uses the tools of their social class to reach the set goal. Everything is the pathetic reflection of a reality ultimately composed of so many different solitudes.
Right after the unforgettable performance in Some Like It Hot, Jack Lemmon is simply sensational in the role of the ordinary man, clumsy and servile employee of a large insurance company who finds the strength to react to a system finally perceived as unhealthy, demonstrating excellent deepening into a role that, while essentially comical, contains in itself obscure implications. Forming a perfect pair with Jack Lemmon, Lemmon reveals a sort of hidden vulnerability he would have treasured later and which in this phase contrasts greatly with the ease exhibited only a year earlier alongside Monroe.