Shankar Salim Simon presents a socially relevant story that attempts to promote communal harmony through the intertwined lives of its three protagonists. The screenplay is straightforward, focusing on emotional and dramatic elements to engage the audience. The pacing is moderate, with the first half establishing the characters and their backgrounds effectively, while the second half delves deeper into the conflicts and resolutions, maintaining audience interest.

The film's songs and background score, though not credited to a specific music director in the available data, complement the narrative by highlighting emotional beats and cultural settings. The cinematography by P. N. Sundaram captures the essence of the era and the mood of the story well. However, some sequences may feel dated to contemporary viewers, and the storytelling style is typical of the late 1970s Tamil cinema.

Overall, Shankar Salim Simon balances its message-driven content with entertainment, relying heavily on performances and the emotional weight of the story. The film's music and BGM support the narrative but do not stand out as major highlights. It remains a notable film for its attempt to address social unity through mainstream cinema.

Vijayakumar: Delivered a sincere and grounded portrayal of his character, effectively conveying emotional depth.

Rajinikanth: Showcased early signs of his charismatic screen presence, bringing intensity and charm to his role.

Jai Ganesh: Provided solid support with a convincing performance that complemented the lead actors.

Manjula Vijayakumar: Offered a heartfelt and engaging performance, adding emotional layers to the narrative.

Latha Sethupathi: Played her role with grace and contributed well to the film's dramatic moments.

Manorama: Added comic relief and warmth, enhancing the film's lighter moments.