Annai Oru Alayam presents a heartfelt story that resonates with audiences through its emotional depth and character-driven narrative. The screenplay maintains a steady pace, with the first half focusing on establishing the characters and their relationships, while the second half intensifies the drama and conflict, leading to a satisfying resolution. The film benefits from solid performances and a screenplay that balances sentimentality without becoming overly melodramatic.

The cinematography by P. N. Sundaram captures the emotional nuances effectively, enhancing the storytelling with well-composed frames. The pacing is generally consistent, though some scenes in the second half could have been trimmed for tighter narrative flow. The songs and background score, while not credited to a specific music director in available sources, complement the mood of the film, supporting both the dramatic and tender moments without overpowering the narrative.

Overall, the film stands out for its emotional core and strong performances, particularly from Rajinikanth and Sripriya, making it a memorable entry in Tamil cinema of the late 1970s.

Rajinikanth: Delivered a compelling and intense portrayal, showcasing his versatility in emotional and dramatic scenes.

Sripriya: Provided a heartfelt and convincing performance as the female lead, effectively conveying the emotional depth of her character.

Nagesh: Offered comic relief with his characteristic timing, balancing the film's heavier moments.

Anjali Devi: Portrayed the maternal figure with grace and emotional sincerity.