If watching HatEotS has taught me anything (taught me again, actually) is that many times a film's worst enemy could be the buzz around it. Had it not been for all the talk about it, I might have had lowered expectations and therefore a smaller sense of disappointment.
As the Horror freak that I am, I've always loved Psychological Thriller/Horror films with a sophisticated twist towards the end. This film makes an attempt on having such a twist, but personally, for me, it didn't work.
Let's start off with the good things: the acting was very good, especially by Max Thieriot as Ryan. The way he talked, the look in his eyes, everything was simply perfect for the role. Jennifer Lawrence wasn't bad either, but sadly the best part about her acting was her not being an eyesore, not at all. Great job also by Elisbabeth Shue as a teenagers's mother!
As for the story - I find it difficult to pinpoint my problem with it. The build up seemed sufficient and the twist was surprising enough, and kept up getting deeper and more evolved. Perhaps it's the difficulty to fully grasp and comprehend what had happened happened that took some of the excitement away. I was too busy figuring out one detail when the next hit. So perhaps other viewers will enjoy it more.
All in all, watching this has been a fun experience, though not overly. I can't say "don't watch it!", nor can I recommend it too enthusiastically. If you don't expect too much - you could be in for a treat.