Nowrunnning.com is disappointed:

20:20 offers an extravagant spectacle that exudes surface luminance, but which soon gives way to a messed up interior that’s all potholes and bumps. A wannabe thriller, it scuttles along Mediocrity Highway armed with some natty twists, corny dialogue, stale stereotypes and zero exposé value.

For all the fending off, for all the blockading, there is finally an explanation. If you were like me, wondering what was so enigmatic about that plot that was being kept under wraps for ages, let me tell you we figured it all wrong. There never was a plot in the first place, folks. All those text messages and tons of vagrant news reports that claimed to have a know-how regarding the tale were no better than blank shots in a dark night – simply way off target.

Rediff.com likes the movie(though the review does not explain why):

In the bipolar world of Malayalam Cinema, ruled by two giants — Mammootty and Mohanlal — it would be suicidal to cast both of them in a film and fail to give them equal importance. Dileep achieves this impossible feat with his trusted team of writers — Sibi K Thomas and Udayakrishna, and veteran director Joshiy.

The film is made as a fundraiser for AMMA, where every actor worth his salt makes an appearance (even if it is blink and you miss kind of role).

Now, coming to the most intriguing part of the process, that is the plot; you maybe forgiven, if you feel this is going to be run of the mill stuff in the beginning.

Berly Thomas thinks that it’s worth it: