Yawn. Although the movie pays homage to the ideals of freedom and the anti-Nazism movement in 1940s Europe, the characters feel a little oversimplified, sketched out of a photo novel. 
The storyline lacked excitement and verve for me, often flirting with letters, permits, and clichés. 
Given its origins as an American propaganda film shot precisely during World War II, pitting good against evil, this lack of depth is unsurprising. 

Despite its significance as a pioneering work in its genre, the romance between Bogart and Bergman felt a bit forced and convoluted.
Ingrid Bergman's incredible mix of beauty and charm is undeniable, but soon enough I was also searching for letters to leave Casablanca. Overhyped.