DNA India presents it as the powerful story of an underdog Indian patriot, emphasizing Nambi Narayanan’s achievements, persecution and eventual vindication.

Hindustan Times praises Madhavan’s acting, research and honest direction, though excessive scientific jargon and unanswered questions weigh down the first half.

Koimoi celebrates Madhavan’s artistic dedication and detailed storytelling, calling it an educational, emotionally powerful biopic whose minor flaws never overwhelm the experience.

Bollywood Hungama praises Madhavan’s award worthy performance and the shocking true story, while noting its technical subject and dependence on positive word of mouth.

News18 praises Madhavan’s acting and the remarkable true story, but finds his directorial debut uneven, overly reverential and dramatically disappointing.

Filmibeat applauds Madhavan’s transformation, Simran and the poignant second half, but says the slow, jargon heavy opening may confuse viewers.

The Times of India praises Madhavan, Simran and the moving second half, despite slow pacing, confusing technical detail and an occasionally turbulent narrative.

India TV News calls it a compelling directorial debut, praising Madhavan’s transformative performance, emotional storytelling and sincere portrayal of Nambi Narayanan’s ordeal.

India Today praises the emotional suffering and Madhavan’s passion, but says technical jargon and a meandering middle delay the film’s eventual impact.

The Indian Express finds Madhavan believable and the story compelling, but criticizes the stodgy writing, patchy direction and over the top dramatic treatment.