En Kelvikku Enna Bathil presents a classic revenge drama typical of late 1970s Tamil cinema, with a straightforward storyline that focuses on the protagonist's quest for justice. The screenplay maintains a steady pace, with the first half establishing characters and conflicts effectively, while the second half escalates the tension with action sequences and emotional confrontations. The narrative structure is linear, which helps in maintaining clarity but sometimes results in predictability.

The film's pacing is balanced, though some scenes in the middle portion tend to drag slightly, affecting the overall momentum. The songs, though limited in number, blend well with the narrative and reflect the emotional states of the characters, but the absence of a credited music director makes it difficult to assess the musical contribution fully. The background score supports the dramatic moments adequately, enhancing the tension during key scenes without overpowering the performances.

Overall, the film relies heavily on Rajinikanth's charismatic screen presence and the supporting cast's performances to engage the audience. While the technical aspects like cinematography and production values are modest, the film's strength lies in its emotional core and the moral dilemmas it presents, making it a memorable entry in the revenge drama genre of its time.

Rajinikanth: Delivers a compelling and intense portrayal of the protagonist, effectively conveying the character's emotional depth and determination.

Sripriya: Provides strong support as the female lead, bringing grace and emotional weight to her role.

M. N. Nambiar: Excels as the antagonist, adding menace and complexity to the conflict.

Vijayakumar: Offers a solid performance in a pivotal supporting role.

Manorama: Adds comic relief and warmth, balancing the film's intense moments.

V. S. Raghavan: Delivers a credible and steady performance in a key supporting role.