So, the clown is creepy, and there are some scenes that are intense, but I never really felt it was that scary. It also suffered from the typical horror movie problem of wondering why the behavior of the monster changes. Obviously, the easy answer is because the script calls for it, but it lacks in in-story explanation. Same to be said for the kids deciding that they need to stick together, and then, almost seemingly on purpose, run away from each other at every turn.
The story of the kids becoming friends and doing things together was interesting and well done. However, their interactions with literally everyone else in town was over-the-top ridiculous. That all adults were cartoonish villains, and the bullies were over the top aggressive and everywhere, just made it hard to believe. It would have been appropriate if this had been a kids movie, but with an R rating, that clearly was not the intent.
Finally, it didn't help that pretty much every scene of interest was already shown in the trailers. These might have bumped the scare factor, but expecting them took all of the suspense away.
A bummer, cause I was looking forward to this one, but it really had me waiting for it to just end by the cliched finish.