Sonnal Thaan Kaadhala is a quintessential T. Rajendar film, marked by his signature style of storytelling that combines melodrama with intense emotional sequences. The screenplay is heavily dialogue-driven, often leaning towards theatricality, which may appeal to fans of Rajendar's distinct narrative approach but can feel overextended to others. The pacing is uneven; the first half establishes characters and conflicts but tends to drag with repetitive scenes, while the second half picks up slightly with more dramatic confrontations and resolutions.

The songs and music, composed by T. Rajendar himself, are typical of his work—melodious but sometimes overly sentimental, fitting the film’s emotional tone but lacking contemporary freshness. The background score supports the dramatic moments effectively but occasionally feels intrusive due to its loudness and frequency. Cinematography and production values are modest, reflecting the film's budget constraints, with a focus on close-ups and stage-like setups rather than visual innovation.

Overall, Sonnal Thaan Kaadhala caters primarily to an audience that appreciates T. Rajendar's unique filmmaking style, with its blend of earnest performances and melodramatic storytelling. However, it may not resonate well with viewers seeking a tightly scripted or modern cinematic experience.

T. Rajendar: Delivered a typical Rajendar-style performance with strong dialogue delivery and emotional intensity, though sometimes appearing over-the-top.

Murali: Provided a restrained and sincere portrayal, adding balance to the film’s melodramatic tone.

Roja Selvamani: Played her role with conviction but was limited by the screenplay's lack of depth for female characters.

Karan: Offered a competent supporting performance, contributing to the film’s dramatic elements.