Not so much scary but tense, with a few jump scares that scared the s*** out of me. Do not watch it late at night. I did, and spent the rest of the evening tiptoeing and whispering and worrying my father got eaten by a monster when I couldn't find him, then jumped 10 feet when he appeared behind me. There were a few inconsistencies, but nothing too major. Miliccent Simmons (?), John Krasinski, Emily Blunt, and . . . I want to say Noah something (?) were all amazing in it. I think the biggest surprise for me was seeing little cutie Noah something and remembering he was in Wonder.
WARNING: the silence is freaky and tense and you will expect a jump scares even if there were only a few in the movie.