Definitely worth for one time watch (Yes, because once the suspense is revealed, you may not find it thrilling. For first time viewers, a good watch). Wamiqa was stunning, and is Prithviraj and the kid. Personally, I was not very pleased with the story theme (that will only get revealed in the climax.). Have seen many movies released with the same/similar kind of theme in Hollywood as well as in Malayalam. But till the climax, the movie is very engaging. So watch it without knowing anything about the movie, else you will miss the thrill. 9 would have been a astounding work if the movie-makers made it more of a science-fiction thriller. ( You may get disappointed if expecting a true science fiction movie in 9, because the science fiction event described in the movie is just a plot setter and has actually not much significance with the actual story )