LOTS of people think IT is a terrifying movie, but I watched it and found it to be the most painful, boring, ridiculous, stupid, unscary four hours I've experienced in my life. There was potential in there, somewhere, but the movie completely lacked any buildup to any scares, and buildup is the key, you can't just show something scary happen as soon as a scene starts and expect it to frighten anyone but younger viewers.
I completely loathed the movie and I wonder if the book is better and scarier, but I kind of don't want to read it just because the movie was so unbelievably lame. The acting was so bad, the script and dialogue were absolutely atrocious, and all the "scares" where more funny than anything.
I'm not saying there's anything wrong with someone being scared of it if they were scared because it traumatized them as a child, but still...this movie is horrible.
It definitely needs to be remade, and they should leave out that unintentionally hilarious spider.