There was so much hype about this movie and I was pretty encouraged by the fact that it was directed by Gautam Menon, a director who has show that he can be in a different league in Tamil movies.
However, his attempt at a psycho killer movie is awful to say the least. The screenplay is so poor and the first half is especially bad. There is no background music or songs in this film that ran for quite a long time, in excess of 2.5 hours, I think.
When psycho movies like this are attempted, the lead character playing the psycho needs to be able to pull off the rule with great gusto. The new face who took on this role in this movie is awful. His attempts at conveying his psychopathic feelings are not at all convincing. In fact, it is quite annoying to watch.
The twist in the movie is so weak that it was largely unnoticed by the crowd. Several people started to make fun of the movie when it lost speed. The only highlight of the movie is Sameera Reddy's performance. She probably has about a 30 minute role in the movie and does well although it doesn't even nearly make up for the other inadequacies in the movie.
In conclusion, this is just a marketing driven hype that will probably run it's course in the box office and do well in terms of revenue. However, you will be pretty disappointed if you spent your money on this movie. Don't disappointingly say "I should have trusted that IMDb review" after watching it.