Awesome Music: French band Dionysos did the entire soundtrack. This was a given.
Cult Classic: Outside of France, very few people have even heard of it, and even fewer have seen it. Those that have tend to love it.
Ensemble Dark Horse: Joe is fairly popular, despite being the closest thing this movie has to an outright villain. It probably has a lot to do with the Evil Is Cool factor in both his design and Grand Corps Malade's voice.
Fridge Logic: The Bittersweet Ending really feels like it can (and should) have been averted, not least because Miss Acacia desperately tried to rush back to him with said key in time all the way from Andalusia. Why not try to repair his heart and then decide to risk loving her? Georges Méliès is clearly every bit as talented as Madeleine, and even fixed Jack's heart once before. Why not ask him to do it again, or, heck, even give Jack a stronger heart, one that could handle the stress of being in love? At least if Jack tried to save himself and made his decision afterwards (he and Acacia had an Almost Kiss before with no heart issue, so there's a good chance it wouldn't have killed him after all), it would seem a little more considerate to both his girlfriend and his now dead mother, who both went though so much trying to keep him safe. Jack's actions only make sense if he wanted to die.
Heartwarming Moments: The song "Mademoiselle Clé/My Lady Key" and the scene which accompanies it. It is a simple and sweet moment where everything seems perfect as Miss Acacia gently tinkers with Jack's heart.
Values Dissonance: Certain western audiences objected to the rather blatant sexualization of Miss Acacia (just listen to some of the musical numbers involving her, including the soundtrack-exclusive ones), given her age. Then again, in Europe, the age of consent is usually comparatively lower than in America (especially in California, where the vast majority of America's movies are made).
What Do You Mean, It's for Kids?: Less so than most examples, since there's no overt sexual or violent themes. Consider that this movie was rated 12 in France and the English release got a PG rating, but there are some pretty risqué lines.
Woolseyism: The English dub is quite good, even if the line reads are a bit rushed to keep in time with events.
