You have to be clear that our main actor will do stupid things here. If you can accept that and won't start thinking, about his every move, as if it were the dumbest thing a person can do, than you could enjoy this movie, otherwise ...
A friend of mine, who disliked this movie a lot, stated it clearer. If characters in a slasher movie act a certain way, you kind of expect them to do so. But in a thriller, you'd be excused to expect, that they'd think before they do something. Again it's not the case here. But apart from that, the actors play their roles great, the story is good enough and there still is tension (if you let your guard down, as said before). Enough said then ...
A friend of mine, who disliked this movie a lot, stated it clearer. If characters in a slasher movie act a certain way, you kind of expect them to do so. But in a thriller, you'd be excused to expect, that they'd think before they do something. Again it's not the case here. But apart from that, the actors play their roles great, the story is good enough and there still is tension (if you let your guard down, as said before). Enough said then ...