The ENDING is fantastic! (SPOILER)
Now this is an ending! Not the canned, predictable Hollywood ending where they fly off into the sunset happily together... Nooo... We get the "King of Cool" Steve McQueen flying off, ALONE, by choice! Drinking a martini in first class and Faye Dunnaway left alone, duped by McQueen and given a telegram basically saying you can come or not, he doesn't care either way. I loved it.
"I don't want your watch, man. I want your friendship!" - Lightfoot