Look I think most people miss the idea here, yes it's suspense movie not a horror, but beyond that, it's about a pretty scary situation that brings two sisters together who at this stage of their lives don't really understand each other.This is a result of some hectic stuff that happened in their past.
Look it's not without some faults, but I found myself engrossed, hoping for them to not only get out of the situation they are in, but to find each other, to whatever end.
It's well worth the time for the fact that there is a meaning here, especially if you're a lady, who has a sister, and the lengths you'll go to try help her in a dire situation. This applies to guys too who have siblings, be them brothers or sisters, or any family member for that matter.
As I said its not perfect, but the acting is solid, I thought these young ladies did very well portraying their characters. It's a good movie, it deserves more than the rating it has.
I gave it 7/10.