Matisse van Rossum’s review published on Letterboxd:
For a story with this many twists and turns, Lucky Number Slevin is surprisingly succinct. It leaves you a trail of breadcrumbs to follow until you finally get the answers you want, but unlike some films, it doesn't shove them down your throat. The best word I can use to describe this film is smart. Every aspect, from the solid story, to the clever script, to the excellent performance, every little detail had thought behind it. I found the dialogue and atmosphere vaguely Tarantino-esque, which is never a problem in my book.
My favorite aspect of Lucky Number Slevin, by far, is the cinematography. Peter Sova, who I knew previously as the director of photography for The Strangers, is incredibly creative and makes this film a real treat to watch. Accompanied by a strong score that is more subtle than overbearing, Lucky Number Slevin has a very unique, mildly surrealistic atmosphere that makes nods to other films but still manages to be its own. The characters are colorful and ruthless, and Paul McGuigan has a superb cast to work with. Morgan Freeman, Ben Kingsley, and Bruce Willis deliver the strong, solid performances that are characteristic of their careers, and even Josh Hartnett is convincing and engaging as the eponymous Slevin.
Lucky Number Slevin is a film that manages to be clever without being pretentious. It's well constructed and executed and doesn't outstay its welcome. A strong film from beginning to end.