Rendu offers a light-hearted romantic comedy experience with a screenplay that leans heavily on situational humor and the charm of its lead actors. The story is straightforward, focusing on the protagonist's romantic entanglements, but it occasionally suffers from predictability and formulaic sequences. The pacing is uneven; the first half is engaging with a good mix of comedy and romance, while the second half tends to drag with repetitive scenes and forced humor.

The songs composed by D. Imman are melodious and fit well within the narrative, though none stand out as particularly memorable. The background score complements the comedic and emotional moments adequately but does not elevate the film significantly. Cinematography by Prasad Murella captures the vibrant settings effectively, adding visual appeal to the film. Overall, Rendu is a passable entertainer that caters mainly to fans of the romantic comedy genre but lacks the depth and freshness to make a lasting impact.

R. Madhavan: Charismatic and natural, Madhavan carries the film with his effortless charm and comic timing.

Anushka Shetty: Delivers a decent performance with good screen presence, though her role is somewhat underwritten.

Reema Sen: Offers a lively portrayal, adding to the film's romantic dynamics.

Vadivelu: Provides the comic relief with his trademark humor, though some jokes feel repetitive.