Can any movie really do justice to the devotion fans feel towards Harry, et al? The final film “works like a charm,” says New York’s David Edelstein, and the muggle world agrees: The movie’s been setting box-office records and drawing older fans than its predecessors. Was this the perfect way to say goodbye to Hogwarts? Are you in a perpetual state of mourning from here on out, or can you hold it together enough to review Harry Potter and the Deathly Hallows in one (Rowlingesque?) sentence?