It’s so obvious what’s going on in the early part of the film that it’d take you to be paying almost zero attention to suspect otherwise, but knowing really doesn't matter, it’s even arguably beneficial for what comes later.
I'm aware that many people consider the film derivative and/or pure trash, but that's their choice. For me, De Palma proves that he was fit to wear the suspenseful shoes of his biggest influence more than once, most notably during a lengthy scene at a motel (where else?). It's so damn good on a technical level, regardless of what you think of the rest of the film.
4 dramatic exits out of 5