The Highwaymen is a wayward movie. It tries to blend actuality, lyricism, and social criticism. At key times, it's an awkward blend.
The strength of The Highwaymen is the two gifted main actors. Kevin Costner and Woody Harrelson portray the two former Texas Rangers, who pursued Bonnie Parker and Clyde Barrow. Costner is Frank Hamer and Woody Harrelson is Maney Gault. They humanize their characters. The film is worth seeing for their performances. It could be titled Frank and Maney.