Parthen Rasithen stands out for its engaging storyline that blends romance with suspense, keeping the audience invested throughout. The screenplay by director Saran is tight, with well-crafted dialogues and situations that escalate tension effectively. The pacing is brisk, especially in the first half, which introduces the characters and their relationships with clarity and charm. The second half intensifies the drama, although some sequences tend to be melodramatic, which might divide audience opinion.

The film's songs and background score complement the narrative well, with melodious tracks that enhance the emotional depth without overpowering the scenes. The music, though not credited here, was widely appreciated at the time of release for its catchy tunes and romantic appeal. The background score effectively heightens suspense during critical moments, adding to the film’s thriller aspect.

Overall, Parthen Rasithen is a well-executed romantic thriller that balances emotional drama with engaging storytelling. While some narrative choices lean towards conventional tropes, the performances and direction elevate the film, making it a memorable entry in early 2000s Tamil cinema.

Simran: Delivered a compelling portrayal of Nandhini, capturing the character's obsessive love and vulnerability with nuance.

Prashanth: Played Vasanth with charm and sincerity, effectively conveying the emotional turmoil of the love triangle.

Laila: Provided a strong performance as Anjali, balancing innocence and strength in a pivotal role.

Raghuvaran: Offered a solid supporting role, adding gravitas to the narrative.

Raghava Lawrence: Contributed energetic and memorable moments, enhancing the film’s entertainment quotient.