Of Lucky Number Slevin, Roger Ebert writes:
[The movie] goes to some pains to make it clear it is only an exercise in style. Here we are looking at a crime mystery involving warring hoodlums and beautiful neighbors and a confused guy from out of town and a gunman and a cop, and the movie knows we’re deluded and they’re all just conceits. It’s smarter than we are. Well, it must be, because it got us to watch it.