It's definitely hard to pin down a personal favourite Wilder film, though I tend towards his earlier masterworks such as 'The Lost Weekend', 'Sunset Boulevard'...and THIS. He was one of the finest at getting straight through the bullshit and to the heart of all things noir (as the immortal Jean-Luc Godard stated, 'All I need to make a film is a man, a girl and a gun'). Barbara Stanwyck is one of my favourite actresses of the period, and is a classic 'femme fatale'. I've never been a huge fan of Fred MacMurray, but his 'nice guy' persona is used to sheer advantage by Wilder, and he end up both doing his finest work for Wilder (here and in 'The Apartment') and being the ultimate noir male protagonist. Interestingly, one of my favourite actors, Edward G. Robinson, thought so much of the script that he opted out of his demand of never doing a supporting role. Many people admire Wilder the director, but as a writer (or co-writer) he's just as cinematically important and influential. Like any other film of his, at least that I've had the pleasure to see, it's worth a purchase and re-watches. The dialogue, especially, is simply fantastic. I'd take just one of his early works over a hundred of the films Hollywood churns out nowadays. They're simply that better and intrinsically satisfying. Immortal cinema.