Agreed. Billy Wilder was a cinematic genius.
His wonderful movie “The Apartment” (1960) is even better than this one.
You can see it here in bluray or download it using downloadhelper Firefox add-on.
http://viooz.co/movies/304-the-apartment-1960.html
More Billy Wilder films
http://viooz.co/search?q=Billy+Wilder&s=d