Starts off with an appearance of a more constructive story, but soon in the first 30 mintues or so we see that there's the typical horror scenario:
**protagonist** which for the entirety of the movie stays in a **place** we slowly get to know throughout the movie, and a **villain**, which in this case makes the movie a slasher, shows his presence after half of the movie's duration passed.


It's very easy to go with this type of flow in horror but it's also easier to make mistakes by making it more bland and boring in the second half of the movie, after we get to know all the character and ambientation aspects during its introduction.
I think the story is concise but refined to such a point where almost 2 hours of its simplicity doesn't feel heavy, that's why I reccommend the movie; but that doesn't mean it's spectacular, hence my rating.


There's also some smaller things which I consider as mistakes, but not that severe to such a point where the rating goes down because of them:
-One mistake being, that the villain can go in and out of the gas station [spoiler]to put the people he captured in a single room[/spoiler], but he can do so without the door chime making noise, that would mean that he can do as he pleases because unless our protagonist sees him phisically entering the store, she can't know he entered it because of his _"superpower"_ to silence door chimes. I could judge this not only as a mistake but also as a plot hole which serves to fulfill the story's purpose and make the villain _'scarier'_, but the fact that [spoiler]Mary sees hallucinations[/spoiler], it could play a part in this.
And by the way this also happens in other slasher movies where for the sake of making a killer actually kill a large amount of people in a short amount of time (something that would be impossible in real life), they give them superpowers where they can teleport or be invisible without making it obvious to the one who's watching the movie.

-Another very small mistake which happened during the movie's shooting is around an hour and a half, when our protagonist Mary goes back into the gas station and in one shot she takes the keys with her after closing the door, while in another the keys are left in the lock. Again this is a very small mistake and it's not noticeable at all.