Spoiler Free
Decent nail biter. Not breaking any ground in anyway but it does have good acting and story. I was invested the entire way through and would actually be interested in rewatching in a month or two, which I can't say for most movies of the genre.
It almost gives me similar vibes as The Strangers (2008) with a tense dynamic between the main characters, and a heavy suspense throughout the film. Would definitely recommend to a friend.
Not sure why the reviews are so low, it's a very decent movie. I think the film advertises exactly what it is and has certainly aged well. It's become a classic in my book.