Positives:

1) Very nice camera work and editing. Movie looks very stylish. "karaka karka" song rocks, even more, with the video.
Go early if you do not want to miss this title song. Serial killer on the loose is an old formula but still it is made interesting.
Credit should go to Kamal and Gowtham.
2) Jo and Kamal romance scenes were nice. Simple but still enjoyable anyday to todays vulgar portrayals.
3) Kamal's restrained performance...what more can i say..he da boss when it comes to acting
4) Everything is very realistic...so in another respect a pathbreaking film.
5) Thamarai and HJ for 4 enjoyable songs.

Negatives:

1) Too much violence, blood and gore. They keep showing the same thing again and again and that drove me crazy.
If Gowtham had restarined himself and not overdone this aspect, the result would have been much better.
He could have reduced the movie by atleast 20 minutes.
2) Too much english dialogues, fine with me,. But a big turn-off for village audience.
3) Kamal's thonthi :) (i know he is 50..but still he is our universal hero)
4) Definite indications to follow hollywood styles..some lack of creativity amd more of inspirations.

BO prediction:
The only persons who will go for the movie are the young male adults in the cities.
So not much of a draw. I doubt if there will be repeat audience.
My guess movie may run well for 25 days.
Gautham had a good script...he could have made it a sure winner if he had not overdone few aspects.

I would anyday watch this film than some silly masala movie.