Well, on a lazy day with nothing to watch with a few hours to kill, I'd watch this movie. Again, you're scrolling through Netflix, Hulu, and other premium channels and you can't find nada to hold your attention- watch this with a low expectation.
The acting is pretty good with an unrealistic plot. Sometimes that's acceptable if you're watching Sci-Fi or a superhero movie, but a movie that uses a realistic premise falls flat if the plot seems unrealistic. That's where the acting plays a huge role. Rosamund Pike does an admirable job and Peter Dinklage is Peter Dinklage.
I found myself rooting against Pike's character which means there's some degree of her character's believability. Two stars.