This was quite lovely. The tension builds because you get to know the characters and you can invest in their well-being. They aren't easily exchangeable teenagers being trapped in a cabin in the woods. These are two individuals with backstory and motivations that are trapped in a moving hell of their own making. The passenger is a fantastic monster and it doesn't get a reveal too early, which would have cheapened it. Instead, it gets built up in exposition and in tension until it becomes quite frightening. I had a good time watching this movie, and I recommend it to all those who are planning to go on a van trip