(Part of my series on watching every movie in the IMDB's top 250). Think of it as a 22-year-old's analysis of classic American cinema.
Some movies age well. The Apartment did not. There is really nothing in the movie (using your flat as a shag-pad for your co-workers, blatantly porking your secretaries, open nepotism, sexism, smoking constantly, drinking early) that would be acceptable at a major corporation today. But more importantly the premise is not very believable and the romance of the movie is almost completely confined to a game of cards. The plot centers around a love triangle that is basically awkward and the ending was glued on with little regard for the plot's concluding acts.
I will say that except for the wrinkles, Jack Lemmon is the same in The Apartment as he was in Glengarry Glen Ross many years later.