Idaya Malar presents a traditional family drama narrative typical of the 1970s Tamil cinema, with a focus on emotional depth and character-driven storytelling. The screenplay maintains a steady pace, with the first half establishing the characters and their relationships effectively, while the second half delves into the conflicts and resolutions, though at times it tends to slow down due to melodramatic sequences.

The film's music, though not credited in the provided data, complements the emotional tone of the movie, with songs that fit naturally into the narrative. The background score supports the mood transitions but does not stand out as a significant highlight. Cinematography details are unavailable, but the visual style aligns with the period's norms, emphasizing close-ups and dramatic lighting to enhance emotional scenes.

Overall, the film relies heavily on performances and the emotional weight of the story rather than technical innovation. While the pacing may feel uneven, especially in the latter half, the movie holds appeal for audiences who appreciate classic Tamil family dramas with strong character arcs and sentimental storytelling.

Gemini Ganesan: Delivered a mature and nuanced portrayal of the patriarch, effectively conveying emotional depth.

Sowcar Janaki: Strong and restrained performance, providing a solid emotional anchor for the narrative.

Sujatha: Brought freshness and sincerity to her role, complementing the veteran actors well.

Kamal Haasan: Showed early signs of his versatility with a convincing performance in a supporting role.

Vijayakumar: Adequate supporting role, contributing to the family dynamics.

K. A. Thangavelu: Provided light moments, balancing the drama with subtle humor.