Seems like most of these "reviews" are people reviewing the other reviews rather than the movie itself, so I'll take a minute to throw in my 2¢.
(vague spoilers, but nothing that isn't revealed in the trailer)
I definitely wouldn't say it's the most original plot out there and at a glance it comes off as sort of Strangers On A Train meets Wild Things with a sprinkle of Single White Female. That said, it's actually a solid thriller with a solid cast, and has enough twists to make it worthwhile and keep the audience guessing.
The only place I think the movie fails is rushing into the murder plot before really giving the relationship and bonding between Amanda and Hayley enough time to develop. And I don't necessarily mean more physical intimacy between the two, just more time spent getting to know each other and building trust in general to maybe help with why Amanda would go along with Hayley's initial plan rather than just calling the police. Or perhaps we needed a little more on the police ignoring Amanda previously and her reluctance to trust them. Either way, something was missing in the first act. Otherwise I thought the pacing was fine, the movie does a good job of building tension, and the leads did an excellent job making their character's emotional state (trauma, fear, distrust, etc) believable. Overall it was a good thriller and definitely worth a watch if you enjoy the genre.
