Honestly.... I think it was a good movie. Of course, it wasn't as scary as I hoped it to be since I watched the original mini-serious (3 hour long movie!!) probably a day or two beforehand.
But, if you haven't seen the original, I would assume that it would be much scarier. Some parts were super scary for me like:
When the girl (forgot her name) suddenly turned around and IT grabbed her, and when Pennywise fell out of the fridge.. super sp00ky.