In many respects, though apart from the title being a give away (which is nice, because having to watch a movie like this one without knowing its intentions is not something you want to do), the beginning may feel a bit slow. But you have to get to know the people you are about to watch. It's not like you will understand the motives behind it all just like that. But you will get hints and what makes the characters tick.
It's really tough to watch, especially later on, when it's really most viewers just wanting to step in and end it. But that is what the movie is counting upon, making you uncomfortable. That is what you are supposed to feel, even if you don't like it. It's not something that can be recommended to watch like that. This is not entertainment. Unfortunately it is something that has happened and will happen again. The movie does not tell us a way out as in prevention or how to avoid incidents like that. It points the camera and shows us the naked truth (also literally when it comes to the actors involved, which is a bold thing to do for them and not at all exciting for the viewer - or not meant to be at least)
It's really tough to watch, especially later on, when it's really most viewers just wanting to step in and end it. But that is what the movie is counting upon, making you uncomfortable. That is what you are supposed to feel, even if you don't like it. It's not something that can be recommended to watch like that. This is not entertainment. Unfortunately it is something that has happened and will happen again. The movie does not tell us a way out as in prevention or how to avoid incidents like that. It points the camera and shows us the naked truth (also literally when it comes to the actors involved, which is a bold thing to do for them and not at all exciting for the viewer - or not meant to be at least)