Not that scary but worth to watch. I think it is pretty good, i just saw the movie today. Diana(The lady ghost/evil) is kind of scary and terrifying. Consider this is a short movie so yeah, it is pretty great.
Teresa Palmer also did a really great job in her character and also the mother. But what makes me laugh is Rebecca little brother, Martin, had a really kind of funny expression.
There is this part where Martin was supposed to be scared but his expression its looked like someone who is mad, i don't know, maybe that because he still a little boy and still learning.
I'm giving this movie 7/10 because even though i think the movie is pretty great, it just that they need more some fire to the movie. The story line is somehow too simple i think so the movie it just seems casual.
my friend was shocked for couple times, but i only shocked and scared once. But if you are not a really horror fandom but curious about the movie, i suggest you to watch it:) it still worth it.