I just came home from watching the movie mama. This is pretty much my review of It.
Characters: all major chracters developed significantly, except the uncle who hardly served any purpose in the movie.
Story: It was very in depth, however with a few minor tweaks, It would have been even more interesting. I am not sure how many would feel about This movie, but I did not find It scary, but rather heart warming.
Re-watchable: maybe once every 2 months...