Yesterday I watched the movie and I really liked it. It's very different from your run of the mill horror films. It doesn't follows the regular horror movie tropes. The movie doesn't uses too many jumpscares to horrify the audience. Some of the haunting scenes happen in broad daylight and can still scare you. The main villain/ghost "Pennywise the dancing clown" can appear almost anywhere instead of just sitting in a haunted house.
Actually 'IT' is not just a horror film. It's also a thriller, a comedy and even a coming-of-age drama . I liked how the makers have thrown alot of humor even in the scenes where the characters are in grave danger. The music is good too.
Also the characters aren't dumb (which is the case with many horror films). They are charming, relatable and make the right decisions most of the time despite being kids. Some of them even have a backstory.
The dialogues are also very good(one kid named Richie has got awesome one-liners)
All the child actors have done a good job in the movie. But Bill Skarsgard(the main villain) is the show stealer in the film.
IT is much better than the recent horror movie Annabelle Creation, or I'll say any movie in The Conjuring franchise. Though the movie has not any great business in India.
I haven't read the novel by Stephen King from which the movie is based on, so I don't know how good the movie is as an adaptation. But I think the movie stands pretty well on it's own.