I don't even know if I really know what to say for this. It's not to be taken seriously despite all the espionage and betrayal that's in it. It pokes fun at so many comic book formulas (and even has jokes about how lame comics are) while setting the stage for Casanova.
Casanova reminds me so much of Hitman's Tommy. Their sarcasm and wit seems to be on the same page despite their differing settings. If Tommy were more suave or if Casanova was more local boy, they could be brothers.
This book definitely lives up to it's Mature rating. If nudity, sex, sexism (directed toward both sexes), violence, and a touch of racism (that's quickly laid to bed) isn't your thing, don't read this comic.