On its own, this movie is a great romantic comedy-- showing how one instance can drag a person into a situation he or she never intended. Lake, Fraser, McClaine, and the actor who plays "Paco" do a fabulous job at making the viewer fall in love with all the characters. I have watched this movie many times, and intend to watch it many more.
This story is based on "I Married a Deadman" by Cornell Woolrich, which is a much darker story than the movie. I'm glad they changed the title when they made this into a movie because there are many differences between the original story and the movie; therefore, no one who read the book will mistakenly watch the movie and expect a faithful adaptation. While both are good, they should be taken indenpendantly of each other.