This film isn't satisfying. The image of the king of terror is a mirage. The character of Diabolik is difficult to represent in a film but the choice of this actor is a mistake bigger than the choice of the actor of the first film. Gianniotti is a gorgeous man but the beauty of this man isn't different from the sex appeal of Diabolik. His apparitions aren't unexpected and spectral but to tell the truth with this man the character of Diabolik results boring.
Valerio Mastrandrea as Ginko results better than Diabolik but worse than in the first film. The reason probably is the general plot of the story too long and with very few action scenes and for a Diabolik's story is a fatal error.
Monica Bellucci as Althea is an evanescent character, totally extraneous from the story.
The only character that is very well characterized is Eva Kant, interpreted by Miriam Leone, that is similar to Eva not only for physical elements but also for the personality.